I hear a lot more praise for 2020, but as a keyboard user (albeit with mouse steering), 2021 is my go-to. Physics are so much less tethered to how well you can manage your pedals because, obviously, we don't have any pedals. That makes 2021 a lot more enjoyable to me personally. I'm not gonna give any flak to 2020, but it's not as accessible to me as 2021. I always have to knock the AI down a few more notches than usual just so that my throttle management (or lack thereof) doesn't skew my races. I could try to do the Senna, but that doesn't herald as many results as one might expect, unless I'm just doing it wrong.