I don't know much about it to say what the advantages are. My computer doesn't even have Windows, period.

But I always say the same thing to anyone asking about upgrading software (to a new version, not fixes) and it doubly applies to OS upgrades.
1. Is the present version still being updated? With an OS, particularly, you need security updates. In this case, I expect Windows 10 should still be supported for a few years.
2. Do you need new features in the upgrade?
3. Does the newer version support your older hardware and support your newer hardware equally or better?
Upgrades this serious should have good reasons to be upgraded. And unfortunately, I don't know what the newer features are or whether they'd be better for you than Windows 10. The other thing to think about is that the upgrade will probably be free for just a period of time. So keep an eye on when that ends if announced. Unless there's a compelling reason to not upgrade, you might as well at that point and save yourself the cash.
But what Bill said is a really good idea in any case. Then you can always do a rollback.
Update: I just remembered one feature that I thought sounded interesting, but not really a reason to upgrade, IMHO, is the new interface with a MacOS-like dock. Here's a thought, Microsoft, give people more than one choice of interface.