Worth mentioning that not only were they unbeaten, their points per game is equivalent to more than a 100 point season if it was played across 38 games.
If they win the next two, the sleight against them will be that they weren’t in the Champions League. They’ll be very revved up for the Super Cup I reckon.
I've said all season had they been in the CL this season they could have won it. However, they'd have probably lost a game at some point and could have fallen short against City or Madrid, at least in one of the two legs. Even in Europa they were close to extra time against Roma (and a minute away from losing second leg) and minutes away from getting knocked out to Qarabag of all teams.
If they go a whole season unbeaten and win the Europa League i'd say that tops Bayern's trebles of 2013 and 2020 or City's last year. Barca also won the treble twice in 2009 and 2015 and would have won another one in 2019 but for the Anfield comeback.
Winning the treble has been diluted a lot. Going unbeaten a whole season hasn't been done before with a team in Europe and is less likely to be repeated.