But even with everything you say, I still don't see the point. You'd have to find specific switches and keys (which will probably be more difficult to find and more expensive) just to end up with something that roughly matches a rubber dome keyboard.
And yeah, I admit they look cooler overall. And they have a more "hacker" vibe to them which I can appreciate. But again I still can't think why I'd spend all that extra money/effort on something that struggles to match a normal keyboard for typing.
And yeah, when I'm coding I hardly type, I spend most of the time thinking. But I still do a lot of typing in general. Writing online comments, group IM chats, searching stuff on the internet, typing commands into a terminal. And whenever I've tried any of that on a mechanical keyboard, it just feels like my typing speed is unnecessarily slowed down. I get irritated by the latency in the same way I get irritated waiting for a website to load all it's useless extra js scripts that will have no effect on the bit of text I want to read.