The High Aldwin
There's a stark difference between low-magic and no magic. In low-magic you really aren't limited to just 4-5 classes IMO.While I get where you’re coming from, I think you are overselling 5e here. In a no-to-low magic 5e campaign, you are pretty much limited to 4 classes out of 13 (depending on how you feel about monks), and you have to spread them out pretty carefully to fulfill all roles.
If your preferred playstyle is low magic, I can definitely see getting tired of the lack of class choice after 2 or 3 characters.
For low magic, as far as classes are concerned, remove sorcerer and warlock and all magical subclasses for non-casters. So, for me anyway, I could easily see all the other 10 classes.