They sometimes go deep, but that is more at the discretion of the interviewee than Lex. Lex is usually asking questions about topics he has only tangencial knowledge in but is the expertise of the interviewee.
The Chris Lattner episodes are great, and James Gosling had some fun stories in there, and Kernighan had a good interview as well.
Yes, but you write a short function/lambda for connecting them. Just like how you have sed/awk, or the many required flags to make any non-trivial operation "just work".
You're not free from the need to specify how to parse the strings just because your whole human readable system is stringly typed.
The Chris Lattner episodes are great, and James Gosling had some fun stories in there, and Kernighan had a good interview as well.