Canaan is still very much active, they have released few new BTC home miners in the past few weeks, one is named Q and others, they are quit cool and very efficient but I just like buying miners when the market is so terrible.
It can't really compete with Antminer S21 series though, which have better J/TH efficiency. And depending on where/how you buy, Avalon Q's $/TH may lose to S21 series. Although it's good to see they're not giving up to compete with Bitmain.
DYOR - just look at sites like this one
asicprofit dot com slash
As reminder,
asicprofit dot com is a probable scam mining calculator website.