How old is too old?

Everybody is different. The fact that you are asking this question tells me you still have a few left. When you start scaring the DW with your driving, need help parking, then you may need to reconsider what you’re doing.

Individual capabilities vary. Some shouldn’t be driving at 60.

If you’re thinking about it and wondering, you’re not too old.
Once you start misplacing your RV and wearing your underwear on the outside of your pants, you’ll be too old, but will forget to notice!

You are the only one that can answer your question. I have seen folks stop at 50 and seen some still going at 90.

There will be no consensus. Just like driving a car, you are too old when you feel that by driving, you are a danger to yourself and others on the road. Be honest with yourself and considerate to others about when that time comes.

I'm curious...exactly what are you thinking about when you think ahead to when you can no longer handle your rig.

Hopefully you are living life to the fullest while you can!

When you worry less about where you left your keys and more about where you left your rv.

but I am thinking ahead to when I will no longer be able to safely handle my
40 foot diesel pusher.

You just answered your own question.

I think you are getting forgetful. You asked this same question months ago.

I'm 72 and going strong, I find that I just need to work my way up to strenuous activity. Take progressively longer and steeper hikes for an example over several weeks. That gets me conditioned, and my wife, for longer steeper hikes. WE aren't as resilient as we once were and loose conditioning more quickly. 3 weeks of little exercise puts us back at the start of the cycle.
I've run into several 80 year olds on the road. Of course real ailments can affect us but a lot is mental.

wildtoad wrote:
Everybody is different. The fact that you are asking this question tells me you still have a few left. When you start scaring the DW with your driving, need help parking, then you may need to reconsider what you’re doing.

I feel quit the opposite, if your asking it’s probably time.