It's posts like these that make me wonder- Are most of these PDFians NASA scientists???
I just watched the press video after the launch, the semi cryo was mentioned there.
The electronic thrusters for satellites is an actually project running in IITs and NITs as we speak. There was a PDF document in one of these forums.
On topic: Knock as much as anyone want, ISRO is NOT going the spaceX way. There is no road map for reusing thrusters as of today. RLV as far as I heard is pushed for few different applications and Antrix is yet to finalize business case for that.