I assume the problems still are that (1) no Desktop Linux is at the level of macOS or Windows, and (2) the only one close is still RedHat, but most want Debian-based or something else.
MacOS is the best model for a successful desktop Linux to use. Trim down the kernel/drivers to just what runs on that spec hardware, only support that spec hardware, focus effort on the OS and ecosystem, keep it stable, make upgrades trivial, and give it freedom to run other software, terminal apps, etc. And most of all- focus resources on these efforts and charge a lot of money for it!