Think of it as a continuation of the infamous momentmum based gameplay from the early 90s, but on the Sega Saturn and set before any of the 3D entries - acting as if they don't exist.
The original games are held in high regard against Mario's greatest 2D platformers - especially when combining both Sonic the Hedgehog 3 + Sonic & Knuckles. There is nothing on the market which compares to the speed and momentum driven platforming.
People are looking for a sequel to that form of gameplay, building up from those games. Mania is doing just that based on everything we have seen thus far.
Many people will be the same as you, since in the early 90s people were in the mindset to either get a Super Nintendo or Sega Genesis/Megadrive. It wasn't common to find people who had both back then.
If you have a smartphone then I'd honestly recommend giving the Sonic 1, 2 and CD remakes a try. The main programmers of this game are behind these entries - and did a beautiful job recreating the experience in widescreen.
If you do choose to play this game then I think you're in for a treat.