How odd to come into a thread and find a link to my share-with-note (see name/url) instead of a link to the OSNews article it's a share of.
Check out https://v-os.dev/ - it's been adopted to create a new Linux distro that's a hybrid of Linux and Haiku. Pretty light on resource and the Be / Haiku GUI feels so good.
However the kernel differences between Linux and BeOS/NewOS are really part and parcel of Be/Haiku. It's like running Smalltalk in the terminal.
Linux has more platform portability that Haiku (or any new OS) struggles with due to which they can't become popular. If the Be/Haiku GUI and SDK can be fully ported to run on the Linux kernel (like V is attempting), it's a good compromise in my opinion.