[pangram]

Convenience, mostly -- with an electric kettle you can just hit a button and when it pops back it's ready. Also, if you happen to get involved with something and forget about the kettle, it's not a big deal; not so with the stove.

[Aloha]

my stovetop kettle whistles loudly when at boiling.

[CCs]

But when it runs out of water (or you forget to fill it up), it just burns...