This launch has overall been -very- smooth for what SE is able to do right away. There was no mass server outages, no mass waits for an instanced duty toward start of expansion that bottlenecked, etc.

What DID happen, however? As the devs even said themselves, They had unexpected mass growth, leading to an issue that last was seen only way back when ARR launched - They did not then expect the relaunch to be so popular after the flop that was 1.0 so they were shorthanded on equip etc such as the servers to handle the logins yada yada. What happened this time however, isd they didn't expect the mass WoW Exodus leading to a 2.0-style boom in population... During a worldwide pandemic where shortages on computer materials made things like graphics cards that used to run for $300 to sell for $1k+ new, or the same $300ish used and years old. Servers for companies are also being shipped and made as able due to shortages - with some having 1-2 or even longer year waits to receive equipment unless they are willing to spend a fortune to get them early - which is often a loss in the end. To this end, SE has done everything they could and are still trying to do more as they can, to keep things at least moving along as best they are able to. Remember, to those whining a fix only came on "official release day" it didn't - They need time to do things such as identify the cause, figure out a fix, and then ensure said fix doesn't make something else break worse on accident that could do something like, whatever deities or etc you wanna use forbid... wipe all data on the server forever to an irrecoverable state.