[adammarples]

Boiling the kettle means I can make pasta and a sauce in about 12 minutes, boiling on the stove just adds tons of time. Given that the kettle is next to the stove it's simply self sabotaging not to use it, one button press.

[quesera]

This will vary depending on the type of cooktop you have, and whether you have a 240V kettle.

Electric coil cooktops, and 120V kettles are the slowest.

Gas/induction cooktops, and 240V kettles are the quickest.

[SoftTalker]

Yeah huge difference if you have 240V mains. A 120V electric kettle is not much of a timesaver (though perhaps still worth something if it frees up a place on the cooktop that you need for something else).