According to Mr. Yamaki, CEO of SIGMA, it still continues to develop FOVEON sensor.  However, he also says that some essential problems are yet to be solved.

I'm not sure if the new full-size FOVEON sensor will see the world.

By the way, I've also found that even the Bayer sensor with the RBG color filters starts to act like a monochrome one in the range around 850nm and longer.  I confirmed that on the unmodified Nikon D40 and SIGMA fp.  That's why I prefer IR monochrome image using a dense filter like IR850 or IR90 over the fals-color IR.

Happy belated birthday, Airy!

My first new camera, and the first one I bought, was a Nikon FE in December 1982.  That camera was my only camera for over 20 years and served me very well during that time. When I finally sold it the shutter was showing a lot of wear but still worked as well as always.

I experimented with a yellow filter to see if it can enhance some contrast of the images shot by a Bayer sensor camera.  The image looked noticeably jaggy possibly due to the loss of the info of the blue channel.  I didn't test denser filters like orange or red ones, but a red filter could cause the loss of the data of both the blue and green channels.

FOVEON sensor has the same amount of pixels in all three color channels, so it could offer effect similar to the green or red filters if you extract the data of the green of red channel.

The yellow, orange and red filters don't only enhance the contrast but also remove haze in the distance when used for landscapes.  The red filter has the strongest effect.  The details of the distant part of the image won't be recovered by the equivalent digital filters in the processing software.

It could be interesting to see a comparison with AIS Nikkor 50/1.8 (non-pancake) if you could take two identical images.
E.g. like the image with the light bulbs in a row where the background fades out into blur.   

https://richardhaw.com/2024/04/13/repair-carl-zeiss-jena-50mm-f-1-8-pancolar/