I've been on that similar dilemna in the past and I decided to keep my best and mostly used computer at home and buy a very dependable computer that I carry around to and from work and for leisure use, while away from home. I you are computer savvy and love to work on operating systems and have tons of time to do so, Linux is a great way to explore its potential. I tried Linux, but decided to stay with Windows to do digital comms as a long time ham radio operator. My suggestion to you is to just get rid of your old Win 10 computers since they are 'rarely' used and simply upgrade your current and mostly used computer to its full potential and enjoy it. It is true, the end of Win 10 is coming to an end just like anything else.