60+ people come in all sizes and with very different or none at all problems.
Some people do get smaller when aging. about 1-2 inches up to the age of 80 and then (maybe) more.
I do not understand the problem with the oven, as they are usually under the
stove - to pull out. That would be easier for a small person to use than for
a taller person who has difficulties to bow down. Or there is a buildt in oven in normal height then there might be a problem.
It is not easy to plan a kitchen for 60+ people as it has to be on individual basis often and maybe be changed for the next person.
This solution seems to me to be a good one for many different problems.