Brilliant. Too bad there's apparently no built in way to do it.

I was reminded of when Apple started slowing down the CPUs on older phones. Would be nice if you could just configure that on first run. "How addictive would you like your phone to be, sir?"

I feel like my phone is so sluggish when in low power mode (even a 17 Pro), that it could work for this.

On android you can do so from developer mode, but it's a blanket throttle for the whole device. I've been using mine with a 5mbps cap for a few years now.