It’s software and Steam exists to host software. It’s like asking, “what’s the point in Retroarch being on Google Play?” There are a few benefits, such as not needing to go to desktop mode on SD, using the Steam update system and cloud saves.
Retroarch supports cloud saves, it’s very nice to just play a game and know it will be backed up on Steam forever
Are there any plans for tray icon and desktop notification support? Those features are the only reason I would run a desktop email client, without them I’ll just use a browser. I know Birdtray exists but I can’t get it to work with flatpak Thunderbird.
“Patchwork” sounds like a good way to describe Windows as well. Or at least it was when I was a Windows 10 sysadmin and there were two different settings menus to do everything.