That JJK v chainsaw man debate was a interesting read.
Both are are unique from the standard battle manga in similar and different ways. But JJK has is deffo being underated because it isn’t as out there as chainsaw.
JJK is an interesting case.
I recognize the author have some amazing ideas, specially with the power system, and he wants to tell a story that is definitely heavily inspired on togashi (nen and jujutsu bear some resemblances in which both are very hard magic systems) and kubo rather than on kishimoto and oda. And that really interests me, but after reading 50 or so chapters (which were shoddily translated I might add, which corroborates to the explanation of why JJK is not popular overseas) I decided to wait for the anime to give the manga a go, taking advantage of the momentum it builds, I will definitely give it my thoughts when I get going with the read.
Now, im definitely a chainsaw fan but I recognize the flaws of the Fujimoto-style writing and pacing, specially when it comes to details, where he seems to err more frequently than in other aspects, however I do believe that Fujimoto have a very good grasp in character writing and despite what some usually say when the story goes "wild", everything is build up for the moment it goes "wild", I think that chainsawman have a faux simplicity that makes people not pay attention enough to some of the plot elements which leads to people being confused when said plot elements pays off. Another credit to Fujimoto is that he can write a story that is unpredictable yet never reaches the infamous "asspull" territory.
All in all, I think that both series are something special, like the "vanguard" of shounen manga, Act-Age is a manga im fond of too for having the boldness of tackling a non-conventional theme.
I love this trio and want them to really succeed in what they are attempting to deliver