I'm more surprised that the versioning hell that plagues Wayland isn't mentioned usually anywhere: while in theory protocols are supposed to be backwards compat

I'm more surprised that the versioning hell that plagues Wayland isn't mentioned usually anywhere: while in theory protocols are supposed to be backwards compatible, in practice this means that writing a new version starts with copy-pasting the previous version, and extending it - but there is no fallback mechanism in case a client doesn't support the latest and greatest. What really bit me with wlroots (which seems to be the choice of XFCE also) is the input-method protocol: wlroots has v2 implemented, but Qt has v1, v3 and v4 implemented, which makes me laugh to this day - so Qt simply doesn't work wlroots, when it comes to this protocol (to add insult to injury, v4 specification seems to exists in a dead feature branch only that hasn't been touched since years, in the wayland protocols repo). Oh well...