Eventually the Olympics will be spread out between several countries. It’s the only economically feasible approach. Cities no longer want to even bid on the Games because they realize it’s a losing proposition for one city to take it on.
I guess they will do that if it is feasible (Benelux countries, for example - the venues could still be close together). I was surprised the 2002 World Cup was hosted in South Korea and Japan, but I believe that paid handsome dividends in terms of selling soccer in those countries.