I have glue ons in my car, they were on it when I got it.
They have been fine but I must admit the mounting area is much, much bigger than the ones in your pic, almost half the small 1/4 glass. This is probably why it holds on so well. also the design of the mirror, it is very short, therefore does not have anywhere as much weight hanging off it like your pic. That is probably why it stays on ( hopefully it stays that way !)
However..... as a functioning mirror it is useless ! it how has a couple small curved mirrors in it so I can see behind, and is a pain to back anywhere. Then to top it off some silly fool ( me ) put a carby in the middle of the rear window ! so you cant see through that either !
But life is all about going forwards ! I can live with the small hassles !
I must say for a mirror like your pic I do like Bosswrench's idea, personally if you go that far I would wire up the electrical motors as well and have it all properly !
Good luck