True, astrophotographers like monochrome camera because you can prioritize gathering brightness signal over color signal, so you get more detailed photo; you can also use narrowband filter and image under full moon or in inner cities.

However, astrophotographers also complain about the price premium of monochrome camera. Given the same sensor, the monochrome version is typically 20% - 30% more expensive than the color version, which is counterintuitive - you don't need to put the Bayer filter on! So if we can perfect the technique to debayer color sensor, the astrophotographer community would be elated.