Re: 1020 owner here
The only thing Microsoft promised was to try for the older or 512 models of which they used the
insider program for feedback unfortunately the feedback they received for
certain models showed the experience was not good I for one fed that info back
in relation to the 520 and 530 and now I have rolled them back and they are
working fine.
I also have a 930 and my Wife's 735 and grandsons 635 are working fine on windows10 and by the way if you really want WP10 the latter 3 excellent models can be picked up cheaply on EBay.