Beating 27 yo Fed at Wimbledon is far more impressive than beating 38 yo version. And Federer was better player in 19 final - same can't be said about 08 final.They've all had setbacks. Yea he's skipped these tournaments 9 times and in that timeframe, he never skipped RG and only once withdrew. Do you think that that's a coincidence when clay has way more grueling rallies? He centered every year around clay and RG because that's where he felt he had the best chance of winning. And of course he doesn't suck off clay. He has 7 Slams and beat Federer and Djokovic multiple times.
2019 Wimbledon is just as much worth 2008 Wimbledon. Neither was a tough draw and 22 year old Nadal played against 27 year old Federer in a tight, great match. In 2019, 32 year old Djokovic played a very tight match against 38 year old Federer, a match where he was completely outplayed in 2 of the sets and over half of the match. 38 year old Federer also defeated 33 year old Nadal in 4 in the SF. So oldest Federer was better than older Nadal.