Regrading credit card processors, I don't see why it'd be necessary for a personal website. If it's about accepting donations, one could accept cryptocurrency.
Besides, when there's sufficient demand, there'd be several more options for hosting, including ones that are "pro free speech". OTOH, monopolies could end up destroying individual liberty and choice.
You'll have to had external backups, I know lot of people are just using their hosting provider backup services.
There can be several more options for hosting (just as there's other options for a Twitter-like platform), but eventually, instead of harassing the host to suspend them, the upstream provider could be harassed to suspend the host itself. And you don't have as much choice when it comes to Tier-1 ISPs.