> Image sensing devices can use knowledge of satellite orbits to suppress reading a particular pixel at particular time if a satellite is expected to shine towards that pixel

This is functionally the same, but a less flexible technique, as reading the pixel values anyway, and then discarding or covering up the values during data analysis/preparation. IRAF already contains these tools.

Getting shorter exposure times is actually helpful to mitigating satellite contamination. In the last 5 years, we're down to 1-2 electron noise per read, which is a full order of magnitude improvement.