Are OTPs approaching custom standards?

Here's a question?

If someone is fitted for a custom-made bike, will that fitting be right for them 20 years later?

Considering that feet grow wider over time, most bodies become heavier and less flexible.....

Cycling position changes over decades, as does cycling style?

Like shoes by John Lobb, he takes different measurements all during his customer relationship with him, knowing that feet change over time.

Nope, the fit wouldn't last forever, just like a tailored suit wouldn't last forever.

I've been lucky enough to have two fittings 2 years apart, and in that time nothing needed tweaking. I'd be tempted to have another fitting in 5 years just out of curiosity. I expect things to change, but the rate of change will be imperceivable unless I become a fat sod over night.