Obviously ICE cars on the road can be 10-15-20 years old easily while EVs have not been around for that long so you would indeed not expect many broken down EVs. Moreover, after the four year lease on a new EV is over, at least in The Netherlands, a lot of them are exported to the east, leaving mostly new models on the road (nice for us, not sure about the planet as a whole though).
I found some
actual statistics to support my assumptions, haven't made it into a complete study. We are seeing a lot of first gen new cars from ground up new platforms and new brands, you would expect some issues on reliability. Not that this can't all be solved in a matter of time, I'm not against EVs at all. I'm sure propaganda exists, but this seems logical to me. Just my two cents.