It may be that the UI is a bit confusing, in that it's a bit non-intuitive that moving the slider all the way to the right could make the stick not work properly. The wording "persistence" could be interpreted to mean that it provides persistent space for system updates including kernel installs and so on, and people who would want to do that would logically choose to maximize the space for that, and be surprised that it didn't work this way.
An idea to make this clearer could be to present the slider as a choice between "document storage" and "system space", or some such. Or, it could show something red or pop a warning if the user selects an amount of space which could make it difficult to update kernel drivers. (Or maybe both.)
It may be that the UI is a bit confusing, in that it's a bit non-intuitive that moving the slider all the way to the right could make the stick not work properly. The wording "persistence" could be interpreted to mean that it provides persistent space for system updates including kernel installs and so on, and people who would want to do that would logically choose to maximize the space for that, and be surprised that it didn't work this way.
An idea to make this clearer could be to present the slider as a choice between "document storage" and "system space", or some such. Or, it could show something red or pop a warning if the user selects an amount of space which could make it difficult to update kernel drivers. (Or maybe both.)