EK, can you please clarify if this proposal is just for the validation of ElasticPL submissions / solutions. The blockchain would still be secured by POS, right?
Exactly, supernodes would be only responsible for work related stuff.
Question: How easy would it be to implement supernodes at a later stage? I guess we would need a hardfork right? Another thing is security. Supernodes could cause security risks like DDOS on those few supernodes or some other nasty stuff. (Dash should have theoretically the same issue with their masternodes.)