Opening Some Damaged 1980 Kellogg's Card Packs - Are There Many Packs That are Not Damaged?

The 1979 and 1980 Kellogg's wrappers were flimsy and it shows with most of the packs that I've found.  The ones shown today are extreme examples, but most that I've seen have at least lots of discoloration.  Packs from 1970 - 1978 don't show similar discoloration frequently.  

The Mike Schmidt card and wrapper are quite different from the other ones.  The wrapper remained clean around the card, so the discoloration is obvious.  

The 1980 wrappers don't stay together well.  The two pieces of the Schmidt card just separated without me trying to open the pack.  I've seen that frequently.  

Since the wrapper was not compromised before it separated, the card is clean on both sides and has great color.

This George Brett card looks okay on the front after being opened this week (46 years later), but there is a stain on the left side of the card.  Otherwise, colors are nice.

The back of the card has lots of staining.  When the wrapper isn't sealed this is what happens.

The Pete Rose card is probably the most indicative of cards that I've opened.  It shows discoloration on the left side.  These cards were sitting upright in a monster box.  The left side of the card was facing upward and the seal was separated on the top.  

Here is a pack that is separating all the way around.  I might as well remove it from the wrapper since it is not intact at all.

Since I collect unopened packs, it is quite disappointing to not be able to find 1979 ad 1980 cards in clean packs.