Main goal here is having everything directly integrated into steam. Being able to see your full GOG/Epic Library directly in steam and install games without leaving the steam interface.

The installation guide specifies Steam Deck, but I don't see anything that can't be done on a Linux pc.

I use Lutris and Steam to cover everything and it works great. Don't see a need to unify on desktop Linux, unlike the Steam deck.

Dude this dev is lighting fast. It was just updated for tabmaster compatibility an hour ago today

No idea unfortunately, I don't actually own any dlc on Epic/Gog.

NonSteamLaunchers still requires you to use another launcher to manage Epic/GoG games. The main goal with this one (as far as I understand) is that all the games show up in tabs in your steam library, and can be installed directly without an external app.

Oh that's a good question

I was thinking about junk store but this is bigger comparison

He said he used some AI tools while coding it, so I think that means Decky will refuse to add it.

In general I think the Decky store has become harder for people to get plugins officially added to their store. Fewer and fewer plugins are being added these days, it seems to take months for a new plugin to get added, and many plugins never make it onto the store at all. I don't know what's going on with the selection process, but it seems like it's much harder to get into the store than it used to be.