I think the main virtue of the EL-cameras is the possibility of controling the shutter and film winding from a distance, with a long cable or some kind of radio transmitter - it was popular among studio portrait photographers and wildlife photograpers for this reason, as far as I can judge.

I have a very nice perfectlly functioning ELX camera, no problem with batteries, got it some years ago for something like $150,00 - but I never use it, just keep it going!

EASmithV, Good luck with your EL/M!