I've recently performed my first full conversion. The key was that windows took like 15 mins to boot and 5 more to open up chrome. That laptop might be ancient but with Linux it goes 0-browser in a minute, and the convertee is more than satisfied.
Yeah, it's complete BS that the best looking windows, casement and awning, are almost entirely incompatible with window AC units! Like, I have casement windows in my bedroom and the only solution for putting an AC in there is with a "portable" AC, with a horrid looking fabric adapter that tapes to the window. Terrible, 3/10