You wrote: "Not filing will not stop your stimulus."
Yes... it COULD, depending upon what your 2018 AGI was.
If your 2018 AGI was over $150,000 (joint) and that is the most recent data the IRS has for you, then you will not qualify for a stimulus, UNLESS, you file a 2019 return which has a lower (thus qualifying) AGI.
This is the exact case a person reported to have previously in this thread.
