I don't think it's ever too late for people to change.
I don't like to hear about people being too old for making friends and such.
I have problems with that attitude because it seems very discriminatory and seems to reinforce the WT Society's aims: give up on "the world" and on "worldly" people; there's nothing out there for you (except to convert others), etc.
I'm not saying one needs to harass everyone about it, but I don't think we have to assume that every older person is completely helpless or hopeless. The Society really likes to infantalize us all in various ways. I'd like to try not to do it to others.
My living grandma is very old, and is losing her mind in some ways, but she is still cognizant and able to process some information. If she got around to being able to see and read again, they might have a hassle with her questioning things, as she did a bit of rebelling a few years back, regarding me, and it caused quite a flap.
My deceased grandmother and a jw aunt and uncle also not-so-secretly disagreed with my d'f'ing, although their attitudes and behavior were eventually "adjusted" by the elders (and by my refusal to "repent"). But anyway, I once again digress.
There have been posts at this forum by a number of people who left the truth at an age one might not have thought possible, right?