I find this entire thread quite interesting....
I have had a lot of online meetings recently and the meeting content isn't overly different from face-to-face, what isn't said in meetings - just interacting with other people - is missed. For example, I went into my office on Thursday and in the first hour (while I was in an online meeting) had multiple people come up to me to discuss things.
In terms of business trips, my company tends to minimize ones just for meetings but thinks nothing of spending thousands of dollars per person to get essential projects done. I've seen people get sent internationally for projects (again, spending thousands of dollars for Y fares) just because of a lack of planning and I honestly don't expect that to change.