Since a cartridge doesn't know if it is at the first groove on a record or the last groove on a record, don't you mean the arm didn't track the inner grooves so well? That is where 9" and 10" pivoted arms are at their worst. If a cartridge is going to mistrack with heavily modulated grooves, it will do that on every cut that contains them.
i agree too. during the 80s and 90s, i never heard a system wherein there will be distortions at end of record. then around 2000s, i hear a lot of friends talks about what they call inner groove distortions that they had to ask somebody to tweak the alignment to minimize it or remove it. i'm a bit baffled by this as cartridges and arms in the 80s and 90s (that i've heard) never had this problem and newer products in the 2000s exhibit this problem. indeed, a cartridge does not know where it lands along the grooves, and if it plays well in the first few cuts, it should not distort in the end, if it does, the arm should be doing something wrong.