Jeans never tear in the crotch; they just upgrade to awkwardly constructed kilts.
yet another reason I wear kilts to begin with...
More likely we will just remember what our ancestors knew: the crotch of trousers is a wear item and you should plan on maintaining and eventually replacing it.
I wish, but that is not the trend in manufacturing. The LLRU for clothing is the garment itself, these days.
(Can sew; choose not to replace buttons generally, because: lazy)