Its unlikely any currently congested world will become available before 6.1 and highly likely other NA datacenter worlds will become congested in 6.0.

They are working on getting more servers but it will be months, if not over a year before we'll see any changes to the server hardware. Until then they're focusing on software changes to increase capacity but there's no ETA on when or if that will ultimately happen.

In short, unexpected and unprecedented surge in popularity + microchip supply chain shortages = uncomfortably long wait time with congested servers.