...engine.
https://ebiketuner.com/blogs/news/how-to-derestrict-a-bosch-gen-4-ebike-in-2023
No doubt it’s the best of the main 4 motors but I’d rather have something that works flawlessly with a dongle. Even if it’s not quite as good.
Too many hills near me to be peddling a 25kg bike in limp mode.