the only limitations i see for my electric system:
1) cannot do back to back batches. this is mostly due to the fact that i only have 40a 240v service to the garage and run 5500w elements in my BK and HLT. i don't do this often (barely ever), but i could downsize my elements if this was a major issue for me. as it stands i want water hot as fast as i can get it. it's more important than back to back to me.
2) decoctions. again, i don't do these, but i didn't identify this was an issue. i could always use a little banjo burner when i wanted to, but electric isn't conducive to this.
3) my immersion chiller no longer gets nearly as deep as it used to. this means cooling 5 gal batches is harder. this just occurred to me as i usually run 10gal, but bought a 5 gal recipe to try a few weeks back. considering going to a CounterFlow Chiller as that won't matter as much, and just using the IC for a herms coil (right now it's herms coil and IC double duty)
all in all i love my electric over my propane setup. quiet, automated temp control means it's more accurate, i actually get my water up to temp faster from cold to mash temp, mash to masth out, runnings to boiling. i can sous vide with it, the brew stand isn't 500 degrees anymore, no carbon monoxide so i can brew with the garage closed.