Not seen it, only the Edge installer with that build number. https://forums.mydigitallife.net/th...20h1-2-vb_release.80763/page-207#post-1614519
It's a hot mess of pre-release activity now. Again, if you can wait for the official release, wait. If bleeding edge and experimentation is your thing, go ahead.
Programs that were "challenged" were those that are Windows version sensitive. For example, Tweaking.com - Windows Repair. By the way, I wish I had an Alienware PC. I have a Dell Precision, I like it, but it's not an Alienware.
Those are not really user programs but botching software, of course those need to run on a build they support, although 19041=19042.
Still interested how that would work when 1903 and 1909 will go eos, with the same shared updates. as with 2004 and 2009.