.
Not only that, another system could require adapting it to or building a whole new game world that the one a gm has been building over months or even years of gm'ing.That is probably true. For me, trying new systems takes more time and effort than it does for me to hack an edition of D&D. I just don't really have the time to try new systems anymore. I tried to get into PF2e, but after about a month of looking for a group I gave up, and honestly I don't have the time two play in two groups anyway.