There's no denying that Source 1's use as a commercial game engine has not been the greatest, though the few non-Valve games that came out of it have been met with largely positive reception, from the OG VTMB still being played to this day, to Apex Legends probably being the most popular non-Fortnite Battle Royale.

Wonder if Source 2 licensing would be a good option for game development, especially if Valve can push Windows/Steam Deck cross-platform development being a feature