I do miss it, and if I could I would. Really interesting that coincidently, if I didn't have an autoimmune disorder that attacks my back seriously (Ankylosing Spoditlitus) and I could wave a magic wand and go back 30 years, I would love to be involved in agriculture. What is more important than growing food (hopefully sustainably, and organically whenever possible)?Sounds like you really miss it, could you not get back into it? Even freelance?
Always liked creative based stuff, but I couldn't do it as a job, I am used to farm work and being outdoors and get a bit fidgety after say 30 minutes at a computer. Although I'm fast becoming a lot more patient in that regard.
I also find it painful being shackled to an indoors life, but I spend as much time as possible in nature. My girlfriend would live outside if she could, and if my physical state hadn't been affected as much as it has been in recent years, we would be canoe camping, hiking and immersing ourselves in long cycle trips all the time. Being outdoors is the best thing and I am happy that you have that. Enjoy it as much as you can. Nobody can ever be certain that their body will continue to cooperate so everyday that you are fit and able is a gift.
I'm not crippled, but I had to give up so much in the way of activities that I once enjoyed. Hopefully some of the effects of this condition can be controlled through lifestyle and medication hacks. Time will tell. Until then, sadly I am in front of a computer and not out in a field or forest.