I don't agree with this.
It's too easy for people to use traits unsafely. Sure everyone on your team might know to do that, but when a new person joins your team how do you maintain that culture.
There is also a large number of people in the PHP community generally who also don't know use them safely. That's a tough cultural fight, that I'd rather not have.
Better not to have traits in the first place, use standard composition. You don't have to fight culture, and it has no negative impact on your code.
So basically you're saying don't use traits? That's certainly one position to have. I think they can be useful in certain situations, so eschewing them entirely is maybe throwing out the baby with the bathwater. But I agree that you need to know why they can be bad if you do use them.
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