Old FM radios never die, they just fade away...

I have owned and used quite a number of ordinary table top (or
portable) radios in my life. All of them tend to go bad in the same
way after some 10 years or so: they do not "hold the station" and
distort from mis-tuning. You try to adjust the tuning on them every
day, although they have been tuned to your local station for a number
of years without a problem. The audio section typically works fine, as
I can conclude from the ones that has a line input. I usually throw
them away and buy new ones, but I would like to know what age do to
them. My radios all have had pre-selected tuning of the variable
resistor type. My current Philips kitchen radio is a 1991 model that
is on its way to the city dump...

Anyone knows what typically happens to (ordinary) FM radios with age?

Would I have better luck with a digitally tuned device?

Per.