Huh! When the eShop was shutting down last year, I was wondering if I should spend the money on these games and decided to a day or two before the deadline. It had been brought out that at the time, the 3DS eShop was the only way to purchase and play these games (in a legal way) since their original release on the Game Boy. Considering there had been nothing Mega Man related released for the Switch Online apps to that point on any of the other systems and Capcom did their own re-releases of the original Mega Man games as well as the X series, it seemed that if they were made available again in the future that Capcom would probably include them in some type of bundle for a Mega Man Anniversary or collected series kind of game.
But they actually made it the Switch. I guess the demand just isn't there for these games for Capcom to consider them that valuable. Either that or Nintendo and Capcom have come to an agreement and there could be more of their slowly trickling into the Online apps now.
So far, the only Mega Man games I've played and completed/finished are Mega Man: Dr. Wily's Revenge and Mega Man II both for GB. Probably a weird place to start, especially for the date of 2023, but I found myself warming up to and enjoying the games as I working things out and get better at it on the first game (although I followed a poor path for the order of bosses to face based on what I thought the weaknesses of each would be by their names), plus ample use of save states helped keep things moving. That said, I wasn't a big fan of the face four bosses in row that occurs late in Mega Man II after you beat the initial 4 bosses and that trend seems to get continued in these other games.