I read a couple threads on this damn Banjo bolt filter. I havent' found enough difinitive answers to prove to me that it's worth removing. It seems to me that everyone who has good turbo longevity has it because the maintain strict oil/filter change intervals.
I am at 80k and haven't touched the damn thing, but I have used OEM filters and changed my oil at least every 4k, usually closer to 3k. Most that have removed it claim the removal has kept their turbo running, but they have also been diligent about their OCIs. It seems the common factor in turbo longevity is maintenence, not the filter.
Poor maintenece will lead to poor oil quality which will cause the filter to clog, take out the filter, the particles could harm the turbo.
This is simply my conclusion I have drawn, take it with a grain of salt. Others will argue the banjo bolt is the single problem.