usually those from Dragon Military line holds up quite well. maybe back then Pleather in toys is not so common so they had to source a common source which is usually for hard duty & durability, but once the 1/6 market kept up with pleather new pleather being introduced to make them look closer to scale & more leather like, at the price of durability.
Sideshow probably got their pleather tech from Medicom/Takara which is sort of a pioneer for introducing realistic pleather, Hot Toys probably refined theirs from Dragon, but still not as durable as Dragon. And since there isn't much of New Dragon figures out we can't say whether it's the same for new dragon figures.