Retro games often have straightforward gameplay mechanics and unique gameplay elements. I haven't seen any unique and revolutionary gameplay in modern games for a long time...
Retro games have a lot going for them. You're not going to find people trashing or bad mouthing these games because the ones that have survived to be re-playable are generally loved and any misgivings in game mechanics or robotic NPC's, etc. are charming and funny these days. Pick any new game launch and you'll find a bunch of internet trolls picking it apart, noticing crashes, etc. Retro games won't catch any of that hate these days. There's also no micro-transactions.
