Some people like to have their water boiling for a bit (decrease dissolved gases for example), and AFAIU that doesn't necessarily happen so well with some (many?) electric kettles. IIUC, some (many?) models stop / turn off shortly after reaching 100 C (I've heard but not verified that some don't even reach 100 C) and this is not as effective as boiling (maintaining temperature at 100 C) for longer. Excuse the inaccuracies for not taking into account pressure and such
Plastic electric kettles are a bit of a concern for me too for reasons having to do with heating plastic (too much for too long) that's in contact with a liquid that one is about to ingest. Non-plastic ones I've looked for tend to be a bit less safe because of pilot error (unwariness leading to skin contacting heated metal) -- on a stove top for just the period of boiling I am more wary than when an electric kettle is sitting on a tea table for longer periods. I'm an ex-user.
Just trying to point out here that depending on what you want to do with the water (in my own case it's green tea preparation) and what sort of water you get, the type of kettle may make a difference.
Good points. Especially about boiling for longer.
We have a glass electric kettle because, well, using plastic is just slightly bonkers. I can hold the button down and force it to continue boiling if required, but it's certainly a PITA.
I do wish that they'd have a thermometer on the outside though.
And no pressure about pressure.
I was just flipping through and reading my Pocket Ref.

























But it seems like at least the Tassimo now has pods that look more like the Keurig pods...and speaking of...