It’s as Rich says, just take the original, literal meaning of “supported” and you’ll get there:
it means there need to be people to spend their spare time to maintain, test and validate openHABian and to support people that have questions or problems.
And it’s out of the question that it’s their decision what they want to support.
There does not have to be a (written) explanation around for that.
That being said, there also is a technical rationale. Read on here:
