It's a bit presumptuous to say he's "doing nothing". Not having a release out doesn't mean he's not working on his next update. To be clear, I'm not saying he has, either: there's no evidence either way, since there's no communication about anything. Typically there are crickets for months and months (even over a year sometimes) and then suddenly a new update shows up. That's standard for this developer, so I wouldn't be surprised at all if he is actually working on the next release.
But it's definitely hard to know what's going on. I just hope he's not in the big war going on in eastern Europe, because that's always a risk. I can't remember if he's Russian or Ukrainian, so maybe the war doesn't matter, either. I'm not sure.