The only thing I don't install via that way is Firefox addons.
Any specific reason why? Yesterday I installed LibreWolf and saw at the same time a few addons in the AUR.
Do you know what's the difference from an AUR addon or the official Firefox addon repo?
I guess It would be for security reasons because you never know if someone has tempered with the addon.
For my docker containers I use what's up docker which not only alerts me when there is an update but also give a link to the changes, so I can have a look what's happening !
For my system itself... Just doing
sudo pacman -Syu
. Though that's not great, cause some updates can potentially break my EndeavourOS system... I keep sometimes an eye on the forum when I see some critical changes like the kernel itself or nvidia updates though.