[dreamcompiler]

I have bikes with mechanical disk brakes and one with Magura hydraulics. I actually like the mechanicals a bit better. Although the Magura brakes have slightly more stopping power, they're also more finicky and require a trip to the bike shop if they leak or develop an air bubble. The mechanicals I can adjust myself.

For me the real key is disc brakes (whether mechanical or hydraulic). Rim brakes don't have enough stopping power for an e-bike.