That's probably fine. In most cases more than fine.
Baring fire, flood, tornadoes, small children etc what's truly archival and what's reasonable for most people have gotten a lot closer since the 80's.
We know now that tight screwdowns might cause damage, PVC pages do damage even more often.
The currently available stuff while it wouldn't be ok at LOC should be ok for a long time. My one T3 is still in a homemade screwdown from 1978 and hasn't gotten any worse. Not that it could get much worse, but there's been no change. I must admit I still have a handful of cards in the old PVC sheets and even those are ok. I just haven't gotten to transferring them into sleeves and boxes.
Steve B
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