Every system we rely upon is built around assumptions about the people it serves. Most of the time we never notice them. But as our lives become increasingly diverse, complex and changeable, those assumptions may be quietly drifting away from reality.

I recently came across an idea that has stayed with me. Every system is built on assumptions about the people it serves.

The more I've thought about it, the more fascinating it becomes.

Every day we interact with systems designed to make life easier. Whether they're public services, digital products, organisations or everyday processes, they all have one thing in common.

They have to make assumptions:

• They understand what's being asked of us

• We have the time and capacity to respond

• We have access to the support we need

• We feel confident enough to navigate whatever comes next

None of these assumptions are unreasonable.

In fact, they are essential.

Without them, designing any system would be almost impossible.

But what fascinates me is something else.

The people expected to use those systems are anything but standard.

We are profoundly - and reassuringly - different!

We differ in age, health, confidence, digital ability, family structure, culture, experience and the support available around us. And unlike the systems we build, we don't remain the same. Our circumstances change. Our priorities change. Our capacity changes. In fact the only thing that remain constant is change.

Perhaps that's where the more interesting questions begin.

Not whether people should adapt to systems.

But whether, as our lives become increasingly diverse and fluid, the assumptions built into our systems deserve another look.

When assumptions drift away from reality.

Technology has become remarkably good at solving problems.

It helps us communicate instantly, navigate unfamiliar places, access public services, manage our finances, monitor our health and increasingly automate everyday tasks.

In many ways, life has never been more connected.

Yet despite these advances, many people feel that everyday life is becoming more complicated rather than simpler.

Not because the technology doesn't work.

But because many of the assumptions behind the systems we build are quietly drifting away from the realities of everyday life.

The hidden assumption: capacity.

Most digital systems assume we have:

• Enough time

• Enough attention

• Enough confidence

• Enough digital skills

• Enough support

• Enough capacity

Sometimes those assumptions are true.

But for many people, that isn't always the case.

Capacity isn't about intelligence. It's about time, attention, emotional energy and practical headroom.

At different stages of life, those resources expand and contract. The same person may find a digital service effortless one year and overwhelming the next.

Unlike technology, it is never constant.

• At twenty-two, learning another app may feel effortless

• At thirty-five, while balancing work and young children, it feels like one more thing to manage

• At fifty, supporting ageing parents while navigating your own responsibilities, it becomes another demand on already limited time and attention

Later in life, the same technology may provide reassurance and independence.

Or it may become another barrier to overcome.

None of these experiences are unusual.

They are simply different chapters of the same life.

Yet many of the systems we build continue to assume people remain much the same.

• That they have unlimited time

• Unlimited attention

• Unlimited resilience

• Unlimited ability to adapt

Real life has never worked that way.

• Responsibilities overlap

• People become tired

• Unexpected events interrupt carefully made plans

• Relationships become more complex

• Health changes

• Priorities shift

Life rarely unfolds in neat, predictable patterns.

Adding another app, another portal, another password or another process rarely removes complexity.

More often, it simply moves it somewhere else and asks someone else to carry it.

Technology isn't the problem.

This is not an argument against technology.

Technology has transformed society in remarkable ways and will continue to do so.

Artificial intelligence, automation and digital services will undoubtedly become even more capable over the coming decade.

But capability alone is no guarantee of usefulness.

The systems shaping our lives cannot simply become smarter.

They must become more understanding of the people expected to live with them.

Not by becoming emotional.

But by recognising something fundamental:

People are not constant, they evolve.

• Their circumstances evolve

• Their responsibilities evolve

• Their confidence evolves

• Their capacity evolves

The greatest opportunities for innovation may not come simply from building more capable technology.

They may come from designing systems that better reflect the complexity and variability of human life.

Better assumptions.

We often ask how people should adapt to a changing world.

Perhaps we should spend more time asking: how the world can continue adapting to people.

Because maybe the systems we need next won't be built around what makes us the same.

They'll be built around what has always made us different.