Actually Microsoft distributes a huge number of drivers for third parties. Many driver developers have stopped doing their own distributions altogether in favor of using the Microsoft update servers to do this work. Some of the smaller distributors find this the most cost effective option. So Windows doesn't come with a lot of drivers, at least not on the disc, but windows for most people doesn't come on a disc itself. In any case it is irrelevant what you call it, search Windows update for new drivers and you will often find them there--often when the equipment manufacturer does not provide them on their own website.
I expect that if Windows 7 or 8 drivers will work in Win 10, those drivers will be what you are getting from any source.