Exophase is just fine, he just updated Drastic on November 2nd 2018 on Google Play where he is monetizing it.
Soon after he released it for the Pandora he said he was using the platform to develop it, but he might move away to Android, which he did. He just left the current version for Pandora as a "thank you", I guess.
I don't think the Pyra would have any problem running other emulators (I don't know of) or the current one form the Play store running on Android.
It would b nice if he releases a native version though. ED enabled payed apps on the Repo a long time ago.
Idk if it's just me, my Pandora or a Drastic limitation, but I have never been able to use the touchscreen...