As a learning exercise it might be an interesting project,but if you actually want to make parts,its far easier to stick with what you've got.If you can dedicate a computer to the sole function of
running the router,it should work flawlessly for years.Which buys you the time to learn enough about LinuxCNC to actually prepare for the future.There may be more work to do beneath the surface to make LinuxCNC function correctly for your machine even thought it is fairly easy to make it move the various parts around.To name just a couple;setting up soft limits and a homing routine will both take time and effort.I believe Linux is more stable than Windows and am typing this post on a Linux laptop.I also find the LinuxCNC forum to be of limited value as they seem to enjoy technical gobbledegook rather a lot and assume the rest of us will too.Whether its some kind of entry exam to keep the rest of us outside the citadel I don't know.They do definitely know their topic and somebody may well come to your aid.