If he wins 3 trebles with almost 3 different squads it would be such a feat.
Yep, it would immediately elevate him to the greatest of all time without a shadow of a doubt, mainly because of influence over each of them.
In 2008/09 it would be unfair to attribute it all to Messi, but he certainly played the biggest role, outshining Iniesta and Xavi in their primes when he was just 21. In 2014/15 he was even more influential, memorable goals against Bayern and in the Copa final. Provided the platform for Neymar and Suarez to have the exceptional seasons they did. He played a wider role but it was also the point he started dropping deeper into midfield to become the creative hub with Xavi rested more.
This season he will have topped the other two combined if the unthinkable happens, essentially a one man midfield/attack. Suarez has been woeful all season, he hit a good scoring streak mid-season, but his all round play is shockingly poor. Iniesta seems to be rested more and more despite being just 33, Coutinho arrived half way into the year, Dembele was out for half the season and still can't nail down a first team spot, Neymar fecked off in the summer, they've got the likes of Denis, Gomes, Paulinho, Digne and Vidal plugging gaps in the side... and yet they remain unbeaten, whilst proving they just can't afford to rest Messi. When they've needed him, he's risen to the occassion every single time.
We went out the CL to Barca, and I find it extremely difficult to take a liking to them after the period between 2005 and 2009, but Messi is the best i've ever seen, I hope he wins the treble and World Cup just to end the boring debate between him and Maradona (and the more recent laughable one between him and Ronaldo).