I can hear the mercury lamp go: Am I a joke to you???
I mean c'mon, it's kind of the elephant in the room!
I made that prediction already a while back, but things really start to point towards an LED-only world in 2030. Aside from the few specialty types, all of the LED's predecessors will have become history. And since 2nd-hand sales are hardly mentioned at all in all those regulations, it's kind of tricky to predict how easy or difficult it'll be to acquire new lamps for collecting purposes.