Updates often bring problems packaged with them. There are no updates for W7, or FSX, hence why I consider running FSX in W7 the 'sweet spot' for at least the remainder of this year. (YMMV, of course).
I have yet to see clouds and AI traffic in MSFS which rival that of addons like REX and UT2 in FSX (personal opinions may vary, of course).
The ongoing supply chain issues are another major hindrance standing in the way of new system builds for many (including myself).
To come across developers like AH offering their FSX aircraft at no cost is just icing on the FSX 'cake', for me, and will keep me entertained for months to come.