One of the reasons you (OP) will never be happy is because you think that a good BW image is a good color image with all the colors removed - and that is totally not true.
A good bw image depends on the contrast of tones of white, grey and black.
The absolute worst way to get a good bw image is to take a good color image and take the color out by desaturation.
.
.
.
.
Does not really matter to me, because we are only speaking about perhaps .05 percent of total shots, and perhaps .01 percent if you take the tens of thousands of photos that I might take in an active week into account.
Quit spraying and praying. Lean to see and compose the shot. Action? It's called "anticipating the shot". Learn to anticipate the "peak action" of a movement rather than just holding down the shutter button and praying you'll get something. Unless you're shooting a full wedding or NFL game every day there is no reason on earth for 10,000 shots a week. None. At that rate you'll wear the shutter of a pro SLR out in a matter of months.
If you really are working in the tech field you should know that certain specialties require B&W monitors and they are still in production. Granted I doubt you could afford a medical grade Eizo 25mp B&W monitor, but they are out there and being manufactured currently.
Jpegs superior to raw? That's gotta be one of the funniest things I've read today. Despite cameras being "digital" that doesn't mean that being "computer literate" translates to being "photography literate". So step back and listen to the people here who know what they are talking about. Derrel is right, your primary obstacle at the moment is yourself. You want to be able to see "thousands" of images at a time in B&W in the off chance that you may have captured something that will look better as a black and white image. That just smacks of desperation to me. It is the epitome of "spray and pray", and something you should be actively seeking to avoid. If it's too time consuming to have to sift through thousands of images, don't take thousands of images. Shoot with intent, not abandon.