I "upgraded" my laptop when I bought it from Win8 to 10 because it was free. There is no way I would ever pay for an OS at this point. With so many people moving to phones,tablets and small chrome like books, I cant imagine how MS is going to be able to keep this business model going for the home user market.
I still have a Mythtv backend running on Arch linux that we use to record TV with. I store all of our movies on my home server. I did finally replace all of my frontend Pc's with the AMazon FireTV stick. We have 4 of them now and when you side load KODI , the thing goes into beastmode.
FIreTV is right now the best device for this type of work and considering you can a stick for 30$ or so it just makes even more sense.