Yes, they will break. There is a tiny plastic gear in there (same exact one used in the previous generation). The gear teeth are like .050" tall, very thin, and mesh with a metal gear. So yes, that same plastic gear that has plagued the previous gen is still in there all the same, so do a quick search and you will find that will also break. The motors also die, but more often the plastic gear fails. The plastic gear fails faster if you manually fold, since that overloads the mechanism.
The good news is there is a metal gear / higher torque motor fix for these and the install on this latest generation is VERY easy. The trim getting the mirror apart is much easier than on the previous generation and the drive unit itself is similar but has a plastic cover on it as opposed to metal. The plastic cover can be easily pried off the drive unit and the gears/motor accessed.
Make sure to also replace the OEM motor but retain the circuit board in that new drive unit. The OEM motor absolutely WILL NOT work with a metal spur gear. IT will short out the BCM, which costs roughly $1,000 and is a real headache to diagnose and replace.
Look at 1st product here :
https://www.gruvenparts.com/shop-by-car/gm-truck