Some numbers from the added graph:
A top-third / middle-third / bottom-third team has a
62/29/10 % chance of playing in the Finals next year,
67/29/5 % chance of playing in the Finals in two years,
38/33/29 % chance of playing in the Finals in three years.
I think that's a pretty significant indicator that the worst 10ish teams should probably set their sights on 3 years out, while the standings don't matter much for the rest of the league's future chances.
edit: forgot the conversion to %. Numbers don't add to 100 due to rounding.