If you've never had it, you probably won't miss it.
Much like DCC, its better technically, its definitely something but is it worth 1k? That's a lot of money.
I think the vagueness that you are missing out on a tenth a lap is why people get drawn in.
Without it, you'll still love it.
If you can afford it, why not. Better brakes is a sound idea even if you can't specifically measure the results each day.