Look (or we’ll listen) to Larry King’s early years interviews vs later in his career, so I would say probably a life time.
Also keep in mind Lex isn’t a professional journalist he isn’t even what one would call a science communicator.
His podcast is still mainly two people having a conversation than a structured interview but he has gotten better at it overall. His early podcasts had quite a few wired moments where you can see that Lex was somewhere else thinking about something these are rarer now.