So you keep saying, although don't see any evidence for it. MS want you to move to using the MS Store, because that's not terrible. Or manually download multiple files, put them all in specific places and use a powershell script to install it, hah, so easy.
MSIX is just a wrapper around an msi, exe, etc installer anyway.
In conclusion, just make an MSI file, they're much better, look at all these great features https://en.wikipedia.org/wiki/Windows_Installer