Guess who played it finally!
But yeah, Streets of Rage 4 is really good and I honestly think it's the best in the series. I played through the story via co-op mode with a friend. We used to play SoR2 together years ago, so it was a really cool experience.
Cherry has to be my favourite character. Her speed makes her a blast to play.
This is how I'd rank the series:
SoR4 > SoR2 > SoR1 > SoR3