The proper measure of a braking system includes the system's ability to shed heat. A single stop from a
given speed isn't a good metric. 10 stops in quick succession with minimal intervals is a typical metric. In
those type of test the build-up of heat with be significant and the advantage of disc will be apparent.

When I'm lift assisted mountain biking in a venue such as Vail, disc brakes are the only system that's
capable of shedding heat without blowing out a tyre. The rotors will boil water after a single decent.
Anyone running rim brakes is going to see the limits of rim brakes.

On the road, when descending on tight switchbacks in a group, rim brakes can see their limit too. It's
interesting how many old farts remark how discs would be nice to have in that circumstance. About half
of the new bikes in my road club are discs now, esp since hydros became standard.

I have disc on my commuter/tourer/gravel grinder and both my mountain bikes. I just dumped the drums on
my bar bike because I never rode it in the rain and drums/fenders were adding ~5lbs to my bike.

My road bike is still rim brake and I have no plans to upgrade it. I don't like the idea of a stiff fork and I have
no funds for a new bike in any case.