Just because the current system doesn’t do what you want, you think going back to a system of cheating and popularity contests is good? Think carefully about that. Unless you’re the sort who also refuses to listen to music that isn’t on the Top Ten list and only goes to blockbuster movies. If that’s the case, honestly the Fediverse may not be the place for you.
While it would he handy to have everything integrated, it’s not always vital. We don’t need to convert kilograms to seconds very often. Artificially enforced systems have always had trouble replacing older anachronistic ones that are otherwise still useful. Ask people in the UK about their cars’ efficiency and you’ll often get an answer in miles per gallon.
There’s nothing magical about 10, either, other than the accidents of evolution that left us with ten fingers. Base 12 is also extremely convenient, and comes from Sumerians counting with their thumb against each of the three joints on 4 fingers. Go through that process once for each finger on the other hand, and you get 60. And of course, in any industry where things are packed into packages, like nearly everything we buy, dozens fit better than tens. 60 divides very neatly into many convenient and geometrically simple fractions, and a lot of what we do with circles benefits from this.
We probably would have been better standardizing on a base unit that’s a power of two, which has more mathematical weight than ten does.