Do I Need A Filter?

Statistics are useful for that:

GitHub - wiedehopf/graphs1090: Graphs for readsb / dump1090-fa / dump1090 (based on dump1090-tools by mutability)

Use the filter for a week, then do another week without filter.
Check if the numbers change.
(might also want to check gain: Thoughts on optimizing gain - #2 by wiedehopf)