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
Where do you get these numbers, cause according to the actual statistics for musicoin and how often it changes DAG it will hit DAG 95 which is the last possible DAG for 2GB cards around July of 2018.