Thats the only (sane without tons of work) way how you can have a rolling release distro without the need to compile everything yourself, everytime. Dependency issues will occure when glibc gets updated (or any other library) and you only update some programms but not all, its possible that those programms work or not.

Yes but that is on Manjaro if they do not follow basic rules from their upstream and not on arch. If you ignore design desicions then thats on you.

Why should that be a flaw on Arch’s side, when it ooses no issue on Arch’s side? Partial updates are explicitly not supported. That would be fine for Manjaro if they would not encourage the use or for some cases even enable the use of AUR by default.

Looking at the research they are doing and actually looking critical and scientific on their own product, it is actually believable.

I am actually more worried about the USA honoring any contract or licensing agreementa on their end.