B&W camera mod B+W camera modification to monochrome ( black&white black+white black + & white )

Does anyone here have experience, or definitive knowledge, whether it is possible to convert existing cameras to monochrome?

I suppose that it is akin to an infra-red conversion, where you remove the color filter from in front of the sensor, and add UV filter in front of your lens... or is it?

The color filter array allows only red, or blue, or green green to pass through, blocking out most of the light, and using each photosite for only one specific tiny part of the color spectrum.

Removing the CFA would multiply by magnitudes the amount of light and colors that enter each single photosite, and the individual photosites would no longer be exposed to only one of the 3 "primary" colors that our eyes can see, but magnitudes more of light.

The result is multiplying sharpness (resolution if you prefer) by a factor of 4 (2 green dots plus one red and one blue dot makes 4), and you would radically increase the amount of light reaching each photosite - imagine the ISO equivalent you would have, even in the lower ISO ranges, with all that extra light. You could use your lowest ISO settings, resulting in no noise, in conditions where you would have had to increase it. Night shots all of a sudden offer new possibilities.

So I guess my question is, has anyone done it, know of it having been done, and the nuts-and-bolts of it (how to do it, step-by-step), and need we only switch our mode into B&W and all will be fine, or is the firmware not compatible with such a change?

The Leica monochroms are just too expensive, and IMO this would be an awesome way to recycle an outdated camera and give it a new life.

I tried to cram in an many keywords into the title line, hopefully it will help people find the thread and share their knowledge and experience.

EXAMPLE OF THE RESULT, Credit to Steve Throndson:

This company, LDP LLC - MaxMax, converts cameras to 'monochrome visible light'. Looks like you can buy one off the shelf for $2315.

https://www.maxmax.com/b&w_conversion.htm

But remember friends, this thread is about doing it yourself, with an old camera, not about buying a new one for this purpose.