It does not need an update for every Lemmy version, but in the last ones were new features for admins and mods. Apps need to support them. It is good to hear, he is developing on a new version, I like Boost for Lemmy. It was just a long time since the last update.

As you said, it is hard to keep timelines if you are a single dev. But an update every quarter would be nice.

I am looking at the dates when installing an app. I would not install an app last updated a year ago. They seem dropped to me