It's not cheap, but as a comparison the new portable Looftlighter X is £279.
They're not essentials at all. But if you've got the money, like gadgets and don't want to wait, it's a viable option.
It can light a whole chimney of Weber briquettes in 4 mins 23 seconds.
I cooked burgers last weekend, 14 minutes from lighting the flamer to eating the burger.
Definitely not for everyone and they're a luxury that you can live without. But it is great fun to use.