I wouldn't mind taking several months to spend in the wilderness but honestly if I did I'd rather do it where I basically traveled the country doing backpacking treks on lots of different places versus just logging a shit ton of miles on a famous trail just to check a box to say I did a thing.
It's be a lot cooler experience to do say a trek in the southern Appalachians then do one in the northern Appalachians, hit up the coastal mountains around Acadia, then hit the UP in Michigan, fuck around in the Black Hills for a minute, Tetons, Yellowstone, up to Glacier, over to the Olympic Peninsula, see some big ass trees in northern California, see some ancient rock scratchings in southern Utah, hit up some canyons. I mean, that sounds a lot more interesting than just one long ass hike on the AT.