Fast to run or fast to make?
I'm a big fan of if it's stupid but works it's not stupid, especially if you get a runtime speed improvement.
Yeah it might be theoretically difficult to make an update but if by "each type" you mean like the primitive data types (string, int, char etc) I doubt the language is going to change how, for example, an int works. If you they do so many programs will break.
Yup, well first time for one of the big stages. I believe they have done YouTube on some of the smaller events like femme fetals and black in a flash as a "test" of their setup to ensure it would work right for the big event.