8 years... Can't believe what I said at one point about not having patience for challenging action games. Spent the better part of these 8 years doing just that, specifically on this console.
I've come to realize a lot too. First, the internet is effectively 1% of any given group. The gamers that look back, that spend time on the internet, are more likely to be the ones that enjoy narratives in their gaming. The ones that enjoyed sports or arcade-like action are more likely to just move forward with their hobby without looking back. So that's why most of the "retro"(the actual meaning of the word is something new fashioned in the style of something old, it wasn't meant to be an alternative to terms like classic, vintage, or even oldschool) side of the internet looks to favor Nintendo/Sony. The Genesis may have actually outsold the SNES in North America. Whatever the truth of the units sales are on the whole, it was a close race, that needed DKC to push the SNES as far as it got. The point I'm trying to make is that the Genesis was just as popular here as it was in Europe, but the conversations on the internet will be dominated by RPG fans, and which console was better known for that?
2nd: The Genesis library is always going to be obscure, because, as the consoles name suggests, it was a fresh start for the company. Think about the NES. How many people had the same exact game library? Very few right? However as it's library got more and more well known toward the end, people knew what IPs they wanted on the sequel console, thus everyone wanted the Castlevanias, Mega Mans, Marios, Zeldas, etc. The Genesis didn't followup a successful console, so we're back to square one, like the NES. This person has games A, B, and C, and that person has games X, Y, and Z. Even most 3rd parties didn't franchise their IP's from the Genesis, let alone what Sega didn't followup on with the Saturn, whereas Nintendo and their 3rd parties kept the same IP's going for generations, starting with following up on what they started with on the NES.
Now, for one hell of an obscure Genesis game, which did get a Sega Ages port to the Switch, I offer Herzog Zwei. One of the secretly most important games of all time. Japan tried to get this genre off the ground multiple times, but often the PC's they tried with weren't powerful enough, and the games came across as turn based. When Technosoft chose the Genesis to put this game on, and a producer at Sega chose for this to be one of the games that got localized, the Real Time Strategy genre as we know it would be born from there. This game inspired the creation of Dune II and Command and Conquer. The former got a port, the latter had a cancelled port(I believe a beta rom exists), and it comes full circle that the origins of this genre are effectively on the Genesis.