Yeah, that is probably one of prusa weaknesses. There are lots of 3D printed parts. I assembled a mk3 kit and broke one printed part during assembly, but have not broke anything during printing so they are probably fine. I will note that the reason for this is because Prusa feels they can quickly iterate on their design with 3D printed parts vs molding. I have owned a prusa i3 mk3(now mk3s) for over a year now and have been very happy with it.
Not that any FRC team would probably buy it, but I also got a MMU2 and have had a pretty bad experience with it to that point where I just took it off the printer.