That's an interesting point. If you're sitting in your office, the ability to hold meetings and communicate isn't really all that different from what it was in 1985. You could email documents, presentations, and have conference calls (at least in many organizations though not all). Today isn't really all that different.

But traveling? In 1985, you could somewhat stay in touch by telephone (but generally not cell phone) though it was easier if you had a dedicated assistant and international long distance was rather variable. And sending documents probably involved faxes. While meetings/flights/time zones mean I may not always be reachable when traveling on business today, it's a lot easier than it was 30 years ago.