I'm autistic with crohn's disease and food allergies and i swapped overnight. My wife is disabled with food allergies and grain intolerant, she swapped overnight as well. We had no issues with health or anything else going vegan over the past few years. The hardest part was having to do a bit of research about foods and alternatives which is really just a one-time thing.

My autistic boomer mom is 60 and switching slowly, but she's still switching. I know it can be hard to retrain your brain but idk, if my autistic boomer 60 yr old mom who lives in a rural area and only shops at walmart can do it, i've got to assume most people could give it an honest try if they really wanted.

It's frustrating because veganism being difficult is one of the reasons people say they "can't" make the switch. But literally every person i've talked to who has gone vegan, even one with a restricted diet, is like "yeah actually it was a lot easier than i thought". Honestly for me, the only real hard part of being vegan is people being rude to you.