A water kettle lets you consistently heat water to the same temperature (not just boiling, high-end kettles have additional temperature options), regardless of:

- Amount of water

- Initial temperature of water

- Position of water container

They also prevent superheated water accidents.

Yes and: Kettles are much easier to clean than microwave (interiors).

Boiling water in a microwave does not make the microwave dirtier.

In fact if it boils it can help clean it!

True. The mess comes from a son reheating food, often tomato sauce based, without a lid.

most lid are plastics, so i suggest people heating without lids. Cleaning mwave is east anyway. I am sure ppl don't want microplastic laden food.

Better that than reheating it in a kettle!

Well our kettle is 2.4kW, our microwave is 800W or so effectively. Also our induction stovetop is much faster, so the nuking option is slowest by a lot.

Electric kettles make it easy to pour for pour over.

Microwaving has the undesirable side-effect of also heating the exterior of your beverage's vessel.