That's not the opinion of everyone. Gedit for example has an up to date Windows version. Inkscape and GIMP both have macOS and Windows versions, but I think they still run version 2.

GNOME definitely is the focus as their resources are quite limited. That's why I welcome Microsoft using it and hope to see some improvements for Windows and macOS in the future.

Last time I tried it didn't even work well with cygwin, every app would take a minute to start up while it tried to talk to systemd.

You shouldn't use cygwin, but MSYS2: http://www.msys2.org/

For Gedit you can just download it here: https://wiki.gnome.org/Apps/Gedit It starts up immediately for me.

Inkscape and GIMP also have dedicated installers.