Heck: phones. Phones are federated. I pay for my phone service through one company, and you pay for your phone service through another, but I can still call you as long as I dial the right number.
The issue isn’t really that federation makes things hard. The issue is that it’s not how people are used to social media, and very specifically social media, working. And people are strange creatures of habit who hate change.
It’s not a bad shout for beginners by any stretch, but it has a massively overdone reputation for beginner-friendliness that is not really deserved
Cinnamon, for one. Yes, it looks kind of like Windows. But the similarity is surface deep, and it’s also pretty janky- by far the biggest resource hog of all the main DEs, lots of weird snagging bugs and stability issues. I’ve always found it very unsatisfying.
I personally use MATE quite a lot and I enjoy it, but I wouldn’t really be recommending that to Windows users either; it’s pretty old school at this point.
Keep recommending Mint to people by all means, though. If you like it and it’s what you use, that’s still a great recommendation. There is fundamentally no reason why beginners shouldn’t use it as their first distro.