Last time he was active in this thread was Nov 2019, he was usually very active in the past, even when he didn't make updates. Now I think he might be retired from developement. He made crazy gains since his miner was the only decent software during the 2017 market boom and probably saved up tons of ETH and just living on an island somewhere.
Islands that programmers go to usually have internet connection. Wasting a ton of money like that, I would rather guess he's not alive anymore, or imprisoned.