Debian Unstable (often called Sid) is a branch of the Debian operating system designed for active development of new versions of packages. It is considered the most recent, but also the most unstable of the three main branches of Debian. Other software comes with Oldversion and runs under Wine. Xfce Desktop Environments
not planned, sorry
also now that I think about it, doing this sort of theme is not really a thing I’d want to be involved in (was never into “ricing” type stuff tbh), though I might just make myself do it if I really wanted to see that sight come from my own Linux install instead of OP’s