A reasonable solution would be to get to buy the newer model half-off if this happens. Obviously the maker can’t just have his entire biz nuked with refunds if Apple happens to update firmware.
Nobody has a right to a successful business but when consumers can trust their purchases they are more likely to make additional purchases.
> if it stops working.
It doesn't magically stop working though, it would be apple explicitly putting in effort to break this functionality and forcing you to update a device you own, forcing you to use it only how they want you to use it.
Or is that why the tag flashes and makes sounds frequently so that people without phones can know they’re being tracked?