Well they are more time consuming and expensive to build for hobbyists, but I think that the main reason is that when you get a fully programmable keyboard it e

Well they are more time consuming and expensive to build for hobbyists, but I think that the main reason is that when you get a fully programmable keyboard it enables a lot of useful features that obviate things like dedicated function keys and the number pad. Using a columnar/grid key layout the number pad is strictly obviated by a layer switch to number pad keys under the right hand, and I use the same layer on my left hand for the function keys. It's honestly a lot easier this way having F1 thru F4 on the homerow. Coupled with "sticky modifiers" so that they can be tapped instead of being held down to do things like Alt+F4 I don't have any desire to go back to dedicated function keys.