Armbian will continue to maintain the supervised installation method for as long as it remains feasible. This commitment is partly driven by a personal interest in running Home Assistant Supervised on a single-board computer of choice. It is expected that HAOS is not intended to accommodate the wide range of custom hardware configurations that Armbian supports.
Armbian focuses on kernel-level support for diverse and non-standard hardware, and even within that scope, meaningful support is realistically limited only to a curated selection of boards (supported), everything else that work or might not work is “community supported”. Most of those have level of support just enough to run server case / headless scenarios just fine.
As noted by several people here, maintaining low-level kernel support for random or low-cost custom hardware exceeds the mission and capacity of the Home Assistant project. Expecting a small development team to provide stable support across such a broad and fragmented hardware landscape is not realistic. Even the broader Linux kernel community faces ongoing challenges in addressing the explosion of custom hardware over the past decade.
tl;dr;
If not for anyone else, I will keep Supervised install maintained on our fork until it will be possible. But I won’t be answering on any support requests - we have automated test installation in place and in case / when Debian base packages broke it, it will be known that very moment and fixing will be done when (if) possible, regardless of anyone’s request. This is open source world - anyone can help help open source maintainers fixing a common problem.