For me it was my gateway to Endeavour, I had Manjaro set up in a way that satisfied my every need and want.
But having to timeshift my system back into a bootable state after a borked update wave every few months was bad enough to kick me out of my complacency, and go looking for something else.
That's relatable pain. So far I've had a stable 5ish years, and only had 2 issues, one being my own tomfoolery with some KDE config, the other being Nvidia, and I don't gotta tell you kids about Nvidia and Linux, regardless of distro...
ETA: endeavour looks really slick too, thx for broadening my world. Probably need to justify a wipe of a laptop to try that out.
Manjaro constantly winds up having really weird issues, they hold packages back in order to make it more stable, but it honestly just broke things far more often then upstream arch did for me. Manjaro and it's community is also riddled with really weird issues. It was pointed out to me a while ago that manjaro did some updates that broke grub customizer, and when people were trying to figure out what broke and how to fix it, Manjaro instead not only removed grub customizer, but made it conflict with the grub they had so people working on trying to fix it got a shovel full of go fuckyourself in the face