I'd suggest cutting them some slack. The blog says (repeatedly) they'll do macOS first, then Windows. There's only two developers according to their site -- we're not looking at corporate Adobe here. And if 85% of their users demanded Windows apps you can probably assume they'd flip their plans 180 degrees. Assuming they are rational, they go first where they know the money is.

Listerene wrote:

Still irritates me that the OS with 85% of the market continues to get
the short end of the stick in their development. A look at their changes
reminds me that just about *every* text processing software has had
these "improvements" for quite awhile.

Maybe all of that is why I no longer bother with Scrivener.