I put tens of thousands of rounds through my original 870 without ever a problem and I’ve never seen an 870 with a broken extractor.
There could have been some for sure but I never even heard of one.
All the failures I’ve seen with 870’s had to do with the very worst kinds of abuse and neglect.
The only Moberg’s I ever handled were while in the service and even knew they had the feel of worn out junk to me.
Could that simply be to an inherent bias because I grew up with 870’s? Well, I’m still shooting my dad’s original steel butt plate 870 which is a first year of production 870.
While to some it might seem a small thing but I really hate the placement and working of the Moberg safety.