I’m guessing they’re distro hopping. People often jump from Manjaro to Endeavor to get a more clean Arch experience. This is what I did too, on my laptop a couple of years ago, and I’ve stayed on EndeavourOS since.
Do you ever run into upstream bugs, or Idk, package version incompatibilities, on Endeavour? The idea that the 2-week package grouping and delay might help avoid those is one of the main things that drew me to Manjaro.
No, I personally haven’t had any problems with package incompatibility on Endeavour. Anecdotally; on Manjaro I had two system breaking updates.
Started on Manjaro but I was annoyed when they let their SSL certificates expire several times so I moved to EndeavourOS. Now I am using NixOS, and I probably stay with it for a while.