Oh, no! I can clearly see that you have put lots of thought into this! What I was thinking about was more related to "multiple (a lot) of layouts", for example my wish is specialized to have a combination of hacker-friendly (with vi-support) and Swedish layout, something that the standard Swedish PC-keyboard really doesn't do very well.

You have clearly worked hard at finding layouts that please as many as possible! What I was thinking was more along the lines of many layouts, where each layout pleases a few very well and at the same time a sufficient number of layouts to cover everyone. That would be a lot of work. A Kazakh layout with strong emoji support? A Greek layout with good support for mark-down? A layout for the bi-lingual Hebrew-Cyrillic typer?

Perhaps some sort of crowd-sourcing could help? If you can provide a blank image of the keyboard layout, and correctly sized images of each character, people could use simple tools like Paint to drag the characters into place on the blank keyboard and upload to some central repository (a wiki at TMO?). There they can discuss the different layouts that they are interested in and tweak them to perfection (including forks when they disagree). Then others can come in and pick and choose among lots of different layouts when they order a keyboard.

Or perhaps I have just gone overboard with this, and when you say "lots of layouts", you don't mean it for quite so large values of "lots"! :-)