It was what I was responding to... and the relevance was that this mechanic and liking it from a dms perspective specifically set you up as a DM antagonistic to the players.
Level drain mechanic is no different than the mechanics for wizard spells. One mechanic is more "unfun" than the other, sure, but thats it. One mechanic DOES inspire negative feelings and I suspect that is one of the main reasons it doesn't exist any more. I fail to see the connection between the mechanic and antagonistic DM vs Players though.