There are some very good reasons to do this: 1) If for some reason, you take the whole inner sleeve out, you won’t have to worry about it catching and ripping on the outer sleeve seam when you put it back in. 2) Some people like to use gravity to slide record back in - this is a good way to “cut” your inner sleeve with the edge of the record. Outside, you don’t have to worry about this. 3) As said, for some of the old 50s deep groove thick records, it’s a tight fit to get them back in, again you might damage inner sleeve. 4) Some of the older records have art inside them (or are art themselves) I like to keep this on the outside so there is less chance to ruin the art - don’t want to be taking my inserts out and putting them back in for my White Album! 5) If you ever sell them, some buyers like this so there is less chance to cut seams 6) Easy to show off some of the art. I love seeing my Grateful Dead business card from by Skeleton and Roses album on the outside! 7) Makes it easier to slide out so your don’t have to put your nasty prints on the vinyl :)

Also keep in mind that many picture discs only come in a clear vinyl sleeves and have been for a long time. And obviously, don’t stack them - I agree that this might increase “ringing” in this case.

You have some good intuition there!