The continued failure of making Bitcoin scalable on secondary layers and sidechains, and having its existing userbase adopt said solutions en masse (custodians DO NOT COUNT), has proven to anyone not retarded or attached to self-destructive dogma that bigger blocks were always the solution.
Discussion
Big block - not the answer. Failing at layer 2 does not make big blockers right.
I'm not arguing for the ongoing failure of scams like Shitoshi's Venture, rather something more sensible like Cash's earlier increases (4-8 MB); Bitcoin is already at 2 MB post-SegWit, so any argument that it can't (or won't) be done is immediately disingenuous.