The very wealthy, who have used private aircraft during the last 14months to avoid and minimise the potential risks of catching covid on commercial flights might well continue to use these private flights so long as they are convenient and cost effective. However, for longer haul the commercial product will triumph, both by cost and reliability. Such persons didn't get very rich by squandering money foolishly. The extremely wealthy will carry on as before, using their own private aircraft. I heard of such a family in California who own a G650ER, but use it minimally, and for legs of less than 400miles! All about being comfortable and projecting the right image....
As mentioned, the value of personal meetings, especially when it comes to strong business relationships and trust becomes more important the larger the business and longer the relationship. Business class will be the chariot to bridge the gaps, otherwise it will just end up being "Our algorithm against your algorithm" at some point in the not too distant future.