I've considered it, but I've spent the last ~10 years of my life learning and using Vim with esc ingrained into my brain. I've managed to retrain some combinations by sheer force of will and major effort, but I think I might be too far down the rabbit hole for Esc.

I've been trying out jj as escape, but I keep forgetting to use it.

IMO that's a terrible escape sequence.

I agree for the most part. But on the Mac keyboard the Escape key is tiny and way off the home row. C-[ is awkward and there's only a small control key in the left side so I miss it all the time (my pinkies aren't good at hitting the right key for some reason.)

I've remapped Caps Lock to Control and that's working out better.