My understanding is many late model cars are moving the fuel filter to being part of a larger assembly inside the fuel tank. On an older car, a clogged fuel filter (a common problem)could be replaced cheaply and easily. My car's fuel filter cost less than $15. But once they put it inside the gas tank, the repair is much more costly. The shop needs to pump the gas out of the tank, remove the tank from the car and take the tank apart to replace whatever the replaceable assembly is on that model.
It appears that car makers are doing this to increase service revenue and to greatly increase customer cost and inconvenience. The inconvenience is a two hour trip to Jiffy Lube or an even faster self-repair becomes a two or three week wait for a major repair appointment and a bill hundreds of dollars more. I commonly replace discrete (stand-alone)fuel filters 6 to 8 times over the life of my vehicles.
If anyone has a list of car brands that have or have not adopted this design change, please post.