I'm skeptical only of the 2020 data. It's impossible to know how the global lock-downs have affected the number of people playing computer games.
Maybe the trend will continue, and this year isn't an anomaly, and next summer will have even more players.
Or maybe all the summer-time lock-down players will be back at work next summer, and dedicated players (of which I consider myself with 2.5k hours) will be long gone, unless currently broken core mechanics get fixed (i.e. pop growth, pop management, fleet management, UI, AI, busted mid-game crisis, & busted endgame crises).
Don't get me wrong, I love Stellaris, and there is a lot about it that is amazing. But right now it's like a car with cracked windows, leaking oil, and flat tires. You *could* drive it, and you might even get where you want to go, but it's going to be a bumpy, frustrating ride, and I would advise anyone I care about to seek alternative transport.