I’m not one of the dev’s and can’t speak for them directly. However as someone who’s hung out here a lot, they were responding to people just two weeks ago. They’ve also never previously mentioned ending support and even the comment in the thread I just linked certainly sounds like they intend to change that icon in future. I certainly had no expectation they’d abandon HH in any way.
I’m guessing something has simply come up recently - from what I understand HH is their side gig, not a full time job, so sometimes other things take priority. I have no reason to doubt they’ll be back though when time allows.