Right. There was stuff I was achieving in my play of (first) AD&D and (subsequently) Rolemaster, that I wanted to do better, and more of, without the problems those systems created for me.
I discovered Ron Edwards, who helped me discover Paul Czege's comments and games, and rediscover Robin Laws's HeroWars (which I read but didn't understand when it came out), and around the same time I discovered Burning Wheel. This stuff helped me run and complete my second "epic" RM campaign (whereas the first had come to an ignoble end after many glorious years, as I didn't have the knowledege and techniques to manage the "no myth" play that I was attempting, and every guidebook I read in the 90s told me to prep more to make my game better, which I had to work out through my own trial and error was terrible advice!).
Robin Laws in HeroWars and HeroQuest revised, and Luke Crane in the Adventure Burner for BW, were the best two bits of advice that let me run (what I think was) a great 4e D&D campaign.
And then reading Vincent Baker has helped me think more clearly about how RPGing works, and with his ideas and AW I was able to run Classic Traveller successfully (treating it in a very PbtA fashion) whereas back in the 80s it had always defeated me.
Technical insight, helpfully communicated, has absolutely made me a better GM and a better RPGer!