Sticking to one game isn't compulsory...even with the thousands of hours I've put into ED and SC combined since 2015...I've played hundreds of games as well. The few that have stuck around to be played regularly out of all of those multiplayer driven offerings since 2015 is ED, SC, RDR2, Witcher 3 (single player) and GR Wildlands...not much else of note bar the almost annually repeated offerings in the Assassin's creed series...but I can't really class that as one game since there's been 3 or 4 of them since 2015... at least.
The games I've spent the most time on over the last 6 months or so have been PS exclusives on the PS4 pro...Ghost of Tsushima, The Last of Us 1&2, Uncharted series..and Horizon Forbidden West. I'm playing through Uncharted 4: Legacy of thieves collection now on PC...since it got ported over a few weeks ago. Enjoying it all over again too. Naughty Dog sure know how to make a game both immersive and entirely engaging in equal measurement. As a gamer who prefers a good single player story driven epic to having other people ruin it all by just showing up in my games...CDPR, Rockstar and Naughty Dog are pure masters of the story telling genre