The biggest issue ive had (ive only used ubuntu) is the file management. Disks and file system is a bit different from boyh mac and windows, and i had a hard yime figuring out where and how, etc.
I couldnt figure out how to get my home network to work (so my windows pc could grab files off the linux pc) and such.
I had no issues setting that up, between my mac/windows pcs
I do plan on installing linux for my sons pc which he will then be forced to learn to some degree.
I think you just made another point why Linux is difficult to adopt to for non-tech people. It takes a level of understanding about how computers work in general, and operating systems specifically, that that majority of people just do not care to have. It’s not that people are too stupid or anything like that. It’s just that the majority of people absolutely do not care what a Desktop Manager is, or why and how it’s different from the OS itself.
Well… people like you and me care because we think it’s interesting. We are the exception. The very thing we love most about Linux is the thing that stops it from general acceptance. It’s too flexible to “Just Work”.
For file sharing over a network between Linux and Windows, the keywords are "samba" and "cifs". In my experience, that's variable levels of pain in the ass to set up, but does work once you've got it configured. (Sometimes it's easier to run an sftp server or similar on the Linux machine.)