I think the Oakland situation may accelerate relocations as we move forward. There should have been more resistance to the Vegas relocation since it was basically an act of franchise sabotage by Fisher to get the relocation approved. The A's were doing just fine for themselves as of just 3-4 years ago and were well on the way to getting a new stadium in Oakland with a public financing package that was equivalent to what they got in Vegas. Then the Golden Knights happened followed by the explosion in sports gambling and it was clear that MLB was going to rush to get a team moved to Vegas ASAP.
Moving forward, any ownership change in a small market is a potential green light for a relocation. Teams like the Brewers need to make sure their stadium leases are iron clad, otherwise the Brewers could easily be playing in Nashville in a decade. If the owners see dollar signs, they will get a team there.
I would think that the loss of TV revenue will make the publicly financed stadium element even more important. Billions of dollars in revenue can be made up by blackmailing the governments in small markets. The formula has now been proven to work -- drop payroll to zero, raise prices, and make the fan experience miserable. Then wait a few years and blame the fans for not showing up and the relocation will go through without hesitation.