"Shame", in this context, means "a regrettable or unfortunate situation". If a library for "constructing operating systems" came out with exclusive support for

"Shame", in this context, means "a regrettable or unfortunate situation". If a library for "constructing operating systems" came out with exclusive support for Linux, yes that'd be unfortunate (read: "bit of a shame") too. Especially one with its own kernel and userspace.