I think the Wenger comparison is way off. Sure, it’s a warning worth keeping in mind, but I don’t believe Pep is anywhere near past his sell-by date.
Wenger won the title in 2003/04 and finished 2nd the following season, but over the next thirteen years he averaged 4th place. His high point in that stretch was finishing 2nd behind Leicester in 2015/16. That wasn’t a sudden drop-off, it was a long, slow decline. Part of his issue was that the advantages Wenger once had had evaporated. His deep knowledge of the French youth system wasn’t the edge it used to be, and the rest of the league had caught up with the sports-science and off-field preparation he pioneered. He also kept Pat Rice and much of his backroom staff far too long, whereas Ferguson regularly refreshed his coaching team to avoid staleness.
With Pep, maybe his tactical edge has narrowed because opponents have spent years studying and countering his ideas. But as I’ve said before, I don’t think we’ve given him the tools he needs. A great conductor can’t make a school band sound like the Berlin Philharmonic, and Pep can’t hit the same heights with an inferior squad.