Servers and bandwidth can be expensive yo
Doesn’t that just mean federation instance maintainers are self-selected among those members of the community who can afford them in the first place? It’s just a less distributed form of a donation system. Instead of relying on 50 people making a 1$ donation each to pay a 50$ hosting bill, you rely on one person (the maintainer of the instance) making a single 50$ donation. That the maintainer wants to donate is already established, how much they can afford to donate can always be reflected by how much they’re willing to let their instance grow.
That doesn’t bode well for the longevity of any single instance, but I’ve always assumed the general idea was to have as many small instances as possible anyway instead of few big ones, otherwise what’s the point of federation. And if you avoid big instances then there will never be a need to funnel funds into big hosting bills.
Being given the tools to customize something by hand is not the same as being offered enough option to simply choose what you want. Having a good UX means that there was a UI designer who alread did the customzing for you and you simply have click a button to apply it.