Earlier quoted context omitted.
I think all of the 'other package managers' are just wrappers around pacman to give more functionality. I haven't seen any competing completely different package managers. Packaging, yeah, some stuff is only AUR, but that's generally a better starting point than "well here is the source". In general, 99% of what I use is available in proper packages. Obviously that'll depend on what you use.
> generally a better starting point than "well here is the source" Definitely not when it comes to security. We are talking about packages , which means even legit, well-intended programs can be weaponized by the packager . That's a hell of an attack vector.
Most AUR packages I have seen have been incredibly easy to read - if you really don't want to use them, it's still a good framework for making your own packages much more easily, so you can install from source without dumping unmanaged stuff into your system.