Oh cool, why did you make the switch from the big dragon? Oh and where do I find these rules you speak of?
Quite a few people just simply never were on the ride, or only slightly so.
I started tRPGs in a one-shot in 1980 at my cousin's but that never went anywhere and it's a side of the family I've not even seen since that day.
So... in 82 two things happened. I got the D&D basic set as a birthday gift from my mother. Then maybe a month or so later I had my $5 of allowance money (that's about $50 million in today's dollars, or so it seems some times), walked into a hobby store and bought a "D&D adventure" that was in an odd sized box.
That's how I ended up with my first non-D&D game. As a kid I didn't realize there were other options, but the box to 'Melee' had Conan like art so I bought it. That's also known as 'The Fantasy Trip' - and the next week I was back to get Wizard, and some time later the compiled Fantasy Trip book.
These days that game's direct descendant is called GURPS. "Melee" is to GURPS what 'Chainmail' was to D&D.
Sure I played a little D&D back then, but just about as much Fantasy Trip. Didn't play in a 'campaign' for D&D until 84, and that very quickly ended in an RPG horror story.
There's a lot of different games out there. And having never really been 'pulled into D&D' in a way that stuck, I got to play a whole slew of them over the decades with mostly decent folks.
I've also met quite a few people who've never even played D&D. Until maybe Stranger Things this hobby was so small that even though D&D was the biggest game, that ratio probably wasn't so vast.