I think some models still come with plastic safeties. I didn’t hear about this problem 25 years ago. I heard about it 5 years ago. Anyway, the factory safeties are small. There are a few manufacturers (GGG, et al.) who make an oversize steel safety.
I guess the quality of the plastic probably makes more difference than anything else.
I bought a Unique Model L in .22 LR many years ago. The gun is beautifully made of fine materials with the exception of the grips. They were white plastic and were broken when I got the gun.
I made serviceable replacements from the plastic in an old broken TV set. That plastic is absolutely ideal for gun grips and it cost me nothing.
I guess they make better plastic now than they did in France in the 40s or 50s.