The pump seal of the trans will last a lot longer, and you should have seen some of the things I have found stuck between the converter hub and the seal when they came in because of a fluid leak.
The trans would have to come out because a sticker on the converter got warm and came off then found it's way under the seal lip.
We always removed any stickers before one went in to keep that from happening.
Without the dust cover I have seen leaves, and candy wrappers but mostly dirt collecting around the converter hub and the seal.
The seal might last a good amount of time, but when it goes the converter hub was always grooved from dirt and needed to be replaced.