Electric tea kettles...to invest or not to invest

I'm thinking of purchasing one specifically for tea since sometimes I
don't like to heat water on my stove in a tea kettle. I hear that
electric kettles heat water very quickly.

A few questions.

Do they really heat water faster?

How would you regulate how hot the water gets, either boiling or on
the brink of boiling? (usually I let the water rest for a few minutes
before steeping senchas, whites, and other delicate teas)

As a side question, do you measure how hot the water gets before
steeping your high quality loose leaf teas.

Thanks for your expertise.

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