Possibly, but perhaps not nearly on the same level. I say that due to the fact that the general consensus I've seen is that S was the most popular season and greatly increased the show's appeal for many people. I've met many that aren't even into the series as a whole but still appreciate it for S. I know that S is the reason I rank the show among my most favorite anime and without it, it'd still be good but not quite the masterpiece S helped elevate it to. That said, I still love the first season and rank it highly as well, but I would be sad if nothing came after it since it'd be so much to miss out on, the subsequent seasons really add to the story and make it more memorable overall. I think it'd probably be more of a cult following instead of having the mainstream recognition and renowned status it has now.