It's epoch 219 now. For about 4.8 days, the epoch will increase by 1 and the duration is getting shorter. So it's about 1 year left before reaching the curreent claymore 11.9 limit, epoch 299. Will Mr claymore provides at least one update to increase the epoch limit by then? Assuming ethereum keep delaying releases and defering difficulty bomb like now.
The DAG is actually higher for ETC classic and there is no difficulty bomb there so most likely it will reach DAG 299 much faster.
I am assuming since Claymore still charges a fee for this miner he will make the necessary updates as time goes along.
Regarding ProgPOW I wouldn't bet on it because the talk about it has been sparse and most of the devs rather concentrate on POS and sharding than GPU mining profitability.