The Diablo IV open beta will have long queue times at first on Friday, according to Blizzard - Neowin

Blizzard says that it will actually "need queues to properly stress test our services" so people may need to wait a bit before getting in to play in the Diablo IV open beta when it starts Friday.

BlizzConline 2021: Diablo IV: What's Next Transcript, Blizzplanet

Activision Blizzard Warns Of 'Unprecedented Queue Times' For The Diablo 4 Open Beta

Diablo IV servers and other Blizzard games were hit briefly by a DDoS attack Sunday - Neowin

Diablo IV open beta coming March 17-19 for pre-orders, and March 24-26 for everyone else - Neowin

Diablo IV's Super-Popular Beta Returns For One More Weekend

Blizzard is fixing Diablo IV long queue waits; early access to the open beta ends Monday - Neowin

Blizzard warns of unprecedented traffic and queue times ahead of Diablo 4 open beta

Blizzard Warns Of Lengthy Queue Times For Diablo 4 Open Beta - GameSpot

Blizzard Warns Of Unprecedented Wait Times And Server Queues For Diablo IV Open Beta

Diablo 4 Season 1: What Progress & Renown Carries Over? - GameRevolution