Brose has presented a new electric motor, the S Mag, which offers customers several advantages and may also help to save money. The new model is also intended to be particularly advantageous for mountain bikers.https://www.notebookcheck.net/Brose-S-Mag-New-iteration-of-the-electric-motor-brings-a-number-of-improvements-and-lasts-longer.797776.0.html
High Rock Ruti
9 motor failures across 3 Specialized e bikes. Specialized is fantastic standing behind what they sell. Brose has updated four times since 2018.
The current bike,a 2021 Specialized Levo Pro is on it's 4th motor in 1700 miles.
I'm lucky enough to own 5 bikes, if you want to ride emtb's daily, spare bikes are required. I've never had a motor failure with Bosch or Shimano, "just saying"
Belts, very bad idea. It will be the wear point, stretching, dry rot. I can go on. Belts=bad.
Your information is old and out of date and just wrong