It's an important highlight that Atlassian is deprecating all of their on-premise offerings and forcing everyone to the cloud because it's "the future". And then promptly demonstrated how poor of stewards of the cloud they are.
Not true at all. DC is still available for the next decade. It's just not at a price that smaller sized customers can afford to pay, so your point does apply to that group.
They tried to sell my company on their cloud offering but once we described our current deployments scale they backed away since it was larger then they had the capability to support.