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I think Sonic Prime is the best Sonic show so far. The plot is interesting and leaves room for many creative story arcs, with the show featuring many alternate universes of Sonic. The main alternate Universe we see reminds me of both the Archie comics / the Sonic cartoon AKA "SatAM" and what Sonic Forces (the game) might could have been.
I do have some complaints, such as Shadow for some reason seeming to like punching Sonic and the wasted potential of using other existing Sonic side characters from the games (or even the aforementioned comics / old cartoon) instead of some bland side characters they show throughout.
But overall, the show is fantastic. I highly recommend it. It's a great show even if I may not think it is as good as it really should and imo easily could have been as a Sonic show. A lot of that is really just from the perspective of someone who knows Sonic games and stuff already, but I think someone who does not already know Sonic would actually enjoy this show more.