I'm aging and in competition with my former self. And getting whipped on a regular basis.
No, seriously, much like Marmoset, when I ascending my progress was a series of plateaus---or, as I often described it, ratchet. Sudden jump to the next level, stuck there for a while, another sudden jump, level for a while....
With each, better than I had been, better than some people I played with, never as good as some others. Tournament divisions and ratings gave some thresholds to measure. Never reached a point to say "I'm good"; it's all relative.