I tried today Manjaro-Architect (OpenRC, Xfce minimal) on one old and complicated desktop, on which last 7-8 installations with latest Calamares versions didn't work. Every single installation with newer Calamares didn't work. Looks like something is wrong with boot flagging. When I manually changed it with gparted, those installations worked. I only have this problem on this strange and complicated old rusted box!
Well, Manjaro-Architect don't have this problem. After installation I got boot menu as I should. Bravo!
If it works on THIS desktop, it will work on any machine
The only thing is, I can atest, it is not quite yet dummy proof.
I managed to mess something up. I didn't know how to set user and it's password. Should I edit one of those config files at the end of installation?
So now I'm sort of locked out at log in menu lol.
I will wait until you make it more dummy proof, then I will try again.
Good job, btw, I like it how you have so many options, feels like you really are in charge