I have heard (and it may be just rumour) that Microsoft is/are seriously considering Win10 was a big mistake (business-wise) and the next OS offered will not be so cloud based.
My own Win10 desktop operates in Local Mode, so I don't have to fart about logging on to my Microsoft account. My Skype account was linked to my wife's MS account as I first used it on her laptop and to logon to Skype I must use her password. MS can not unlink it as now Microsoft has absorbed Skype. The net result is that I have lost my credits and contacts unless I use her laptop. MS seem not to understand that they made a wrong link, without my knowledge, and now will not and cannot correct this. Wa*kers !

My XP Mach3 machine is on my network, so I can access files on my NAS box. I have, however, turned off Internet access by deleting the gateway address. You can do that easily in XP, but Win10 - probably not.

Voicecoil - there are flavours of Linux that look like windows, so the learning curve is shallow.