Business travel is coming back for the same reason that suits always come back.
Suits are cyclical. Almost all offices go casual late in the cycle. Then the economy rolls over and a few months into the recession, someone shows up at the office wearing a suit because they are worried about their job. The next day everyone is wearing a suit.
Business travel will be the same. Every business will try to avoid travel and stay on Zoom. But then one company, struggling with sales, will send their sales representatives on the road and conversions will increase. The next quarter all of their competitors will be on the road. The same will go for conferences, for diligence, for deals, for executive retreats, for everything.
Business travel will come back.