This is not USB Mass Storage. This is MTP. If this was USB Mass Storage, then the phone would have a drive letter (or two different drive letter for internal storage/sd card) and wouldn’t appear under “This PC”.
EDIT here are some screenshots from The Before Times, when some phones actually allowed you to switch between the two modes. First is UMS, second is MTP. source
Ok, I mean if that’s MTP then sure, I thought it was something else, but I don’t see the problem, I’ve literally never had issues with reading or writing files using it over multiple devices and I have access to everything I’d have with a file browser app on my phone.
Edit:
Reading this article, I don’t see why you would ever want to go back, it sounds like it has way more issues than the current solution.
Idk what phone you’re using but I can do it no problem on my older S21 Ultra and my new Fairphone 6 by just clicking on the notification

This is not USB Mass Storage. This is MTP. If this was USB Mass Storage, then the phone would have a drive letter (or two different drive letter for internal storage/sd card) and wouldn’t appear under “This PC”.
EDIT here are some screenshots from The Before Times, when some phones actually allowed you to switch between the two modes. First is UMS, second is MTP. source
Ok, I mean if that’s MTP then sure, I thought it was something else, but I don’t see the problem, I’ve literally never had issues with reading or writing files using it over multiple devices and I have access to everything I’d have with a file browser app on my phone.
Edit: Reading this article, I don’t see why you would ever want to go back, it sounds like it has way more issues than the current solution.