[gnabgib]

Hard to find stats on how many are fixed vs programmable, but I suspect the majority are not programmable. Anything anyone calls a FOB is a fixed RFID tag. Many used for theft detection (library books, retail stores) are a fixed RFID tags. This seems to be tackling the Electronic Product Code (EPC)[0], which is popular in retail.

[0]: https://en.wikipedia.org/wiki/Electronic_Product_Code

[slow_typist]

Second that, it is way cheaper to keep the intelligent part in the database. With electronic keys it is convenient to frequently update the permissions of the bearer because it allows for offline locks, but for tracking goods, any serial number that is long enough is more than fine.