I've been using outlook 2010 for 15 years (+ and old license of "lookeen")

it seems to be the least bad version I've encountered for an exchange client that seems compatible with modern exchange

if I had super modern exchange and had to use the latest desktop client, I'd probably just use the webclient at this point as it's probably better

ultimately, I'd take gmail over any incarnation of MS mail apps these days (including outlook 2010)