Openstack is made by Canonical, so if you're used to Ubuntu you'll feel right at home in some ways, but it's not so much an OS as it is a cloud management platform. You could use Ubuntu and OS together. As far as choosing an OS, that's really a matter of what you need as a person/company. I will say, I love ubuntu and always use the latest non-LTS versions just to check them out. They've recently took a weird turn away from Xorg and are now on Wayland.... If you need to screen share as a company, be mindful of this because as of right now, you may not be able to when using Wayland.