I believe every epoch is 30,000 blocks and it takes 14-15s to solve a block, So that is a new Epoch every 4.8 - 4.9 days. 60 epochs left till DAG 95. Therefore Musicoin should be mineable on 2GB cards for another 291 to 312 days
Musicion will hit 2GB barrier at 11/FEB/2019, expanse will do the same in april 2026