they were super popular.
but also a bit of a divided fanbase.
sr2 fans, sr3/4 fans.
sr1/2 while wacky, still were pretty grounded around the premise of the city and gangs.
sr3 said fuck it, the world is silly, and players are like gods running around this sandbox. and amped it up. While setting itself apart from the GTA and other clones. its popularity scyrocketed.
sr4 took it even further. But, also felt unfinished as a game, and concept. cars, etc became meaningless with actual superpowers. the fate of the city meangingless, when its all a simulation..
The studio has foundered since.
I def feel the series is kindof dead. Im not sure how you bring it back after 4. even a reset button as noted, I am not sure will really work..
Then, we have gta RP, and RDR 2... the competition is high, and breaking new ground.
I have low expectations. but wish them well, and hope to be proven wrong.