@Jelenafan did make an interesting deep-dive into some of the SFs and records of other competitors, at the time. I admire that research, and it's very interesting, TBH. The conclusion that Roddick WOULDN'T have won another one is a stretch, in my opinion, too, but it IS all just a guess. Seems that AP and Jelenafan are adamant that Roddick found his level, no matter what. I lean toward
@tented's post above, where he simply said to AP that it's not unreasonable to think that Roddick might have won a couple more. He was a very consistent player, and spent 10 full years in the Top 10. I was NO fan. But all of this is supposition and conjecture. Same as imagining if the other Andy (Murray) had been born 10 years later. This thread is all conjecture and opinion, and has moved to very interesting places, especially the deeply historical stuff. The good news is, on opining about the parallel universe, no one is actually wrong.