herf parent
The average car on the road is over 12 years old, and maybe a laptop has maybe 1/3 as long a lifecycle? Not sure that tracking "Wh" as a replacement for "mileage" is that useful, it's either time to replace a battery and SSD or it's not - and perhaps we should have scheduled maintenance for removing dust from your fans? An old PC that has a hard drive replaced with an SSD and a fresh battery is usually a great thing, unlike a car with tons of after market parts.
I think this would make sense in a world of glued-in components where service is hard and somewhat risky (like Apple) and the highest quality components were installed originally. But ultimately the aftermarket value of a PC is only as good as the brand's reputation overall, that means removing bloatware and good quality batteries and other things that are hard to attest to automatically.
A well-built laptop can last you just as long. I’ve been rocking a tricked out Dell XPS for 9 years now and it’s still going strong. It’s really hard to find something better on the market. If I could only change the motherboard with a slightly updated APU like the strix halo or current gen AMD solution, I couldn't be happier.