Good point about piston wall clearance and varying metal expansion ratios.

For factory engines in daily driver vehicles instead of race engines,
what about wear with mileage ?

Let's just assume that a new & well assembled engine
with attention paid to each cylinder individually
will hit at 0.025 at 5500 rpm.

What would be people's guesses
as to how much increased head to crown clearance is necessary
to avoid hitting at 5500 rpm
when the engine ages to, say
50,000 miles ?

100,000 miles?

200,000 miles ?

Related question:
does a head gasket compress a wee bit more with additional years and tighten effective quench ... or does it relax instead and increase quench clearance for the worse?