That's all true, but also keep in mind that team moves don't happen overnight. By the time all of the dust settles, a new perspective owner might find himself right up on that 2021 deadline. I know it's not a simple thing to move a team, but the fact is that you never know. In this day and age if you suddenly find yourself without a viable TV deal, a new owner with little rapport with the fan base might start looking around.
There are exceptions to every rule, but in general owners don't leave their hometowns. For the most part you get owners like the guy in Ok City who swear they aren't moving the team and then...SURPRISE! That's why I say that if an out-of-town guy buys a team fans should be wary. Robert Short owning the second incarnation of the Senators is a perfect example. Having said that, I do have to believe that MLB would be leery of selling a team like the Orioles with a strong tradition in it's town to someone who they think could be another Robert Irsay.
Of course you NEVER KNOW, a hometown owner isn't necessarily going to keep the team in Baltimore either. Yes, hometown owners are more likely going to keep the team but it's hardly a guarantee. Robert Short is a great example of an owner who didn't seem to care if it was local or not, since he moved teams in both cases. I'm just not too concerned -- ONE team has moved in the last 40 years, there's far less viable franchises then the O's. Could things change, of course.
You say 2021 like it's 2001 and two decades away. That's seven years from now.
If an owner wanted to move to another city, most potential sites have at least a temporary stadium option available, especially if the team knows going in that a new park is all set to be built. Montreal has Olympic Stadium, which hosted baseball for 30 years. It wouldn't be ideal, but San Antonio can play baseball in the Alamodome for a while. Portland repurposed their minor-league park, but Providence Park could still host a team. Charlotte is the one place without a great option, but even if they can't expand their new AAA park, the old one down in SC probably could add some seats.
No I didn't, just not too concerned about the immediate future. There were concerns whether Olympic Stadium could even host the exhibition games in the case of bad weather. I'll give you the Alamodome, not sure how viable San Antonio is for baseball as a city itself, less so if they somehow get a football team. In the other cases, it's not like flipping a switch but it's possible. Norfolk was an "option" for the Expos as well.
I always talk in absolutes; it shows confidence in what one's saying. But there are always exceptions, which is why I throw generally in there. Just because you have an out-of-town owner doesn't mean your franchise is going to move. There are in fact some owners from other places that will remain dedicated to that city. But I'm just saying that if a franchise is sold to someone from out of town that possibility always exists.
That's fine, there's more than a few exceptions to the rule in the case. The possibility exists regardless -- for the right price, people will do stuff in many cases NOT always. These are investments for the owners. If they see some city emerging with better demographics than the city they are in and that city doesn't have a team, good chance they'll look into it. Many of these guys didn't make a ton of money by making easy decisions.