Back in day he didn't have any support page, ATD could work during months without give anyone any updates, I think work on a new video with that rendering quality every month is far more hard that he can't keep it up anymore.
I know that ATD is really concerned about quality and he will not update something that he is not proud of. Plus, his lack of update are probably linked to the fact that he was sick last month. I hope the guy is doing better in any form, I really don't want him to burn out : He gained a lot of popularity really quick and really fast back in day he create his Patreon and I was already scared that all the pressure, that popularity and the expectation behind it could easily disgusts him from doing what he was at first passionate about.