Moving parts and complexity makes it more prone to failure.
Also, how much energy do you need to keep this working? It's not said on the website.
Granted, both kettle and this zori trade energy and complexity/failure-potential for convenience. Much more so the zori. How much is unknown.
On the simple, less-energy end, you'd use an electrical resistance in an insulated jar.
All electric kettles will fail at some point. They have moving parts and are designed for obsolescence.
In my place I use a kettle that allows me to boil 1 cup of water. The filter mesh has failed long ago but the water does not have hardness. Instead I use a small improvised cap to keep the flow of vapour to the cut off thermostat (usually at the bottom of the handle).
Better for convenience, energy I'm not really sure. I could see it being better or worse for energy depending on how well it's insulated and how much hot water you drink
These are pretty much the go-to style of "kettle" in Japan and similar alternatives are much cheaper over there if anyone is planning a visit - just note the voltage difference because you may need a transformer
That said, my stainless steel Tefal (T-Fal for those in north america and Japan) kettle has not failed me yet after 6 years of use, if/when it does fail i'll probably be considering one of these!