Aah, a subject I've spent too much time on.
My '94 had an unusually long and deep crack in the normal place when I got it. The filler that had been put in there looked rubbish.
I replaced it with an '84 one that had an almost invisible hairline crack. A year later that had grown out of the pocket recess and was annoying me (even when filled) so I changed it for a dash from an '89. Fast forward a year and now even that has an inch-long visible crack.
I've now got a perfect '94 one to put in and am getting quite good at doing the swap!
If this next one starts to go, I'll drill a 5mm hole before it runs over the top and fill it back in with Silkaflex. That should stop the point of the crack from tearing itself into an even longer one.
I've never noticed anyone hauling themselves out of the car by pulling on the dash, but I have thought about the glovebox being the root cause.