Well Edge is available on most linux distros if they really want to use it.

I do forget that it's all just Ubuntu with different faces. Ubuntu was the first Linux OS I experimented with back in the day. I installed Xubuntu, and I added the Cinnamon desktop for a different style when the mood strikes, though I mostly use XFCE. I tried Chrome OS Flex once on my laptop with a live USB and I wasn't a fan. I wanted my parents to have something closer to what I use on my PC so if issues come up, it'll be something I'm already familiar with. I can offer them the option of Chrome OS Flex, but I think it'll be hard to explain the whole "cloud" idea to them. I had a hard time explaining a Firefox Sync account to them because they use Microsoft Edge and I want them to migrate to Firefox before I install Linux Mint.