I've held off on upgrading my install of OSX for several weeks now because of the apparent damage it does to bootcamp partitions (lesson learned hard from Mavericks upgrade). Is there a way of doing the upgrade without losing my current Windows 10 installation? Or recovering the partition after the fact? Or ensuring my windows activation is recognised on a new bootcamp install (don't want a microsoft account)?
All my googling so far just seems to suggest Apple doesn't care enough to address this directly, after all, this is an 'enemy product', and the forums so far have produced very slim, very iffy fixes.