For the price parity thing, there’s the game Tales of Maj’Eyal that is $6.99 USD on Steam but is free on their website te4.org. Cataclysm: Dark Days Ahead is an open source project, but is on Steam for $19.99 USD. Caves of Qud is actually on sale now on GOG, but the Itch.io and Steam version aren’t. Sure, these may just be because traditional roguelikes don’t garner that much attention, but they are cases nonetheless that show otherwise.
The lack of auto-updates can sometimes be good. StarSector updated relatively recently and if they actually updated automatically (even if they offered an option to disable it, they update so infrequently, I’d probably have neglected it), my save and all my mods for it would just break, or worse break silentl until it was too late.