The Windows Insider preview can be installed as an upgrade, so you don’t have to reinstall everything. But it is glitchy right now. Nothing that blocks working with it, just annoyances. F.e. Explorer and with it the taskbar and the desktop like to die when you use the popup menus to start something as admin f.e., or they just stop responding to clicks (ie, it doesn’t hang, but clicking icons won’t result in any action on them).