Posting styles aside, it appears there may be a problem with the latest Shimano eMTB motor over heating.
The answer 'we've fixed it now' could be true, but it does rather smack of a Kalkhoff/Impulse response.
And like Impulse, I wonder if part of the problem is trying to screw ever more power out of what is a relatively low power system.
I've ridden an ordinary Steps motored bike, and would quite happily run one, but it doesn't have the poke of a Bosch Performance motor.
That hardly matters in day-to-day use, unless you need full assistance on the flat.
Shimano also has form for releasing less than fully developed products to customers.
The early Alfine 11 hubs had a widespread dropping second gear problem.
To be fair to Madison/Shimano, they appear to have changed all the dodgy hubs free of charge.
There were no other affordable 11 speed hubs at the time, but in the case of a crank drive ebike there are similarly priced alternatives.
Most of the quality crank drives are similar to ride, so it seems to me the ubiquitous Bosch motor is the best choice until Shimano has completed its beta testing.
The Yamaha motor also seems reliable, although I read something about them changing battery terminals year on year, which might give users a backwards compatibility problem in years to come.
In a video posted on here, someone from Bosch said the company promises to support products for at least seven years after they drop out of the model range.
The same batteries are in Bosch 2018 bikes, so that means you can be confident of getting a replacement up to at least 2025.