Kodi supports Wayland as the long-term successor to X11 (a successful Kodi GSOC project from 2017) and there are several desktop oriented distro's that support Wayland and people who actively tinker with that combo. LE has no need or plan to use Wayland though. Maybe the lack of browser in Kodi (e.g. via CEF) will be resolved.. nobody knows.
LE has no need or plan to use Wayland though.
Is it still true?
X11 is more and more like abandonware now, it won't have support upstream anymore.
It's better we think how (and when) we can drop it too.
It's better we think how (and when) we can drop it too.
It was dropped since LE 11 and now used only in Generic-legacy.
Was dropped in favor of GBM, but no Wayland still I believe (even optional)?
LE can be built with Wayland. It would miss some crucial features like refresh rate switching. Also Kodi does not support HDR passthrough on Wayland.
It's more like we are waiting for those Wayland features. 
It's more like we are waiting for those Wayland features.
No need to wait, but rather actively contribute for it.
It would miss some crucial features like refresh rate switching. Also Kodi does not support HDR passthrough on Wayland.
Any places (GH issues?) to track the progress to make it happen?
LE can be built with Wayland.
Nice. Is it documented?
PROJECT=Generic DEVICE=wayland ARCH=x86_64 make releaseThat ^ will result in a Wayland image. In theory the same can be done on ARM targets if device "options" files are adjusted.
The Kodi repo is the most appropriate place for discussion and you already found that ticket.
Generic Wayland can be built with:
PROJECT=Generic DEVICE=wayland ARCH=x86_64 make image
otherwise https://wiki.libreelec.tv/development/bu…mands-le-12.0.x will help you out.
From a build perspective this is the only issue I am aware of:
...It would miss some crucial features like refresh rate switching.
Yeah, that's pretty much the critical big kahuna there, without that Wayland is absolutely pointless.