What windows apps do you need? I switched full time to Ubuntu about a month ago and haven't missed a thing. I thought it would be harder, but after some usability configuration changes like how the mouse scrolls, some browser keyboard settings, system font sizes, and logging into a few accounts it has been snag free. Oh and I did install Microsoft fonts. I hate most Linux fonts. The biggest change really is just getting used to new icons. There are several features in Ubuntu I vastly prefer over windows, like window tabs in the file explorer for instance.
So does KDE's Dolphin and many others on Linux. Linux had tabs on file explorers well before Explorer did as well as virtual desktops, app stores, and a few other things that Windows didn't have but later implemented.
