All you said is factually correct but I never had any issue with aur and Manjaro. It seems the issue is more theoretical than anything. On the other side, there are plenty of situations where I don’t want to have frequent 1Gb updates that don’t bring many benefits.
Those cycles are meant for testing a coherent set of versions. If you update Arch on a monthly basis I’m not quite sure you got the same testing. I’ve been running Manjaro for 8 years now (laptop for business and family stuff) and I can’t remember any issue with it. I also have Endeavour and Debian on my desktop (gaming / casual) and server.
Manjaro differs from Arch in terms of update cycles. They are not rolling like Arch but adhere to some monthly-ish release cycle. Which i love by the way.
Yay?