The community is literally dying more and more every year.. a decent player a year ago is going to look like a top player today
Do you have examples? Its not like players can't improve over that time span.
they can .. but most have already peaked out a long time ago. the most obvious evidence of this for me is that if i feel like i'm pretty much peaked out .. like i get to the point where i'm like "shit.. i cant time my peons any better, manage resources any better, continuously scout any better, hold my own expansions/prevent them from expanding any better.. im playing as good as i ever will without investing a lot more hours per/week into this game" .. and that's typically i'm typically playing like 30+ hours a week when i get to that point.
so when i peak out the game becomes boring and i quit.. sometimes for just a little bit, sometimes for a long time ... and then i come back and have a lot of rust because it doesnt take long for me to rust at all.. so i play the same people i was playing before i left and they crush me .. but after a month or two (takes me a really long to unrust also) i'm right back where i was, and the people who had been playing continuously while i was gone (someone like spb) is at pretty much the same skill level as before i left.. maybe a little bit of new tricks or his style has changed a bit, but there are players who someone like myself can guage themselves on .. and i personally know i haven't got any better, but im competing right back where i was with those players
another thing i notice ... typically once a player peaks out (especially if they're considered like top 1,2 or 3 player for their time .. they get bored and quit war2 before too long. so the top players at the time have little competition, get bored, quit, and the lower skilled players take their place as top players, but they were never as good as the top player who left before them.