The kind of battery life you get from these laptops is a step change, in that you go from constantly thinking about the charge on them to not really thinking about it at all. That's a pretty big improvement for most people.
(And it's not like your typical dell reliably lasts 12 or even 8 hours anyway, that's only the best case)
I mean, my 16" MSI with 11th Gen Intel and Nvidia GPU gets 6 hours on Linux (openSuse)... Any current gen laptop with APU should be getting 12 hours. But I don't know Windows, it could be that bad?
(And it's not like your typical dell reliably lasts 12 or even 8 hours anyway, that's only the best case)