I genuinely wonder where that would be; every possibility seems to have pros and cons if you look at it from that lens.
The con of leaving is it almost guarantees Harper plays for more than 2 teams lifetime. Something Harper knows hurts his legacy.
Harper leaves after the season for the Cubs for example. Will be loved immediately but quickly fades and becomes a what have you done for me lately. Strikes out to end the game. "Boo we spent $400 million for this"!
Then hated because the Cubs can't sign guys the Cubs grew from prospects. Fans love guys drafted and excel under their team.
Then the Cubs have to eventually find someone to take a big contract because they want to rebuild. Or eat some of that money.
If Harper where to stay in D.C. and make $400 million over the next 15 years instead of 10, he becomes loved, a hero... Will still make a Billion lifetime, and has no target on his back from home fans.
The way I see it anyway.