Well, If the supreme court is deemed too far right radical after this decision and thus next allowing the threatening of additional settled law such as gay marriage, which I think will definitely happen, in that case the idea of expanding the court to 12 justices or even 16 will be totally justified and an urgent necessity by Joe Biden and democrats.
I mean.... either THAT, or the high court losing any and all credibility. We can not have an US supreme court that only panders to the radical far right agenda with complete disregard for settled law from previous US supreme courts. I see expansion as the only solution if America wants to keep her supreme court in any form.
But look at the bigger picture before us. Republicans in congress, in particular Mitch McConnell, have already perverted the entire system and especially the US constitution with blocking Obama from his constitutional right as president to install his own nominated justice. So technically and realistically, to expand the high court would do no more damage than has already been done by this republican congress.