I've only had my printer for about 6 months, which isn't "long term", but no warpage, shrinkage, etc.
Also, I and many others use a curing station, so most of the time its cured as much as it is going to before we even use it.
Lots of folks have been printing bodies for a couple of years though and I've never heard of that issue coming up.
I do know that both resins and FDM filament have undergone big changes in formulation over the years.