the watch first released on April 24, 2015
that was 2,095 days ago (as of January 17, 2021)
Congrats on hitting 95% of the days since the watch has been out🎉🎉🎉🎉.
It's impossible for anyone to hit 2,500 days until February 26, 2022. The next major version of WatchOS (8) will be out about 4 months before that, so not many people will hit 2500 while running wOS 7, as they should have all updated by then.