Twitter founder Jack Dorsey mocked new owner Elon Musk's company over a major outage, saying it used to be where people talked 'when anything went down'

• Jack Dorsey, the Twitter cofounder, criticized Elon Musk's Twitter management on Wednesday.
• A "massive" outage left users unable to tweet because data was mistakenly deleted, per Platformer.

Jack Dorsey, Twitter's cofounder and former CEO, mocked Elon Musk's company over its major outage on Wednesday.

"Used to be when anything went down, people went to Twitter to talk about it. Now look," Dorsey posted on the decentralized social-media network Nostr, as first reported by The Wall Street Journal.

Dorsey's Nostr profile is verified thanks to a unique key he posted on his Twitter account. In December, Dorsey said he donated 14 Bitcoin to Nostr – around $240,000 at the time, according to Markets Insider data.

Twitter suffered the biggest outage of Musk's reign on Wednesday, as users were left unable to tweet, faced with the errant warning message: "You are over the daily limit for sending tweets."

In a private message seen by Insider's Kali Hays, one Twitter employee described it as "a massive outage."

About 90 minutes after users began reporting problems, the company tweeted: "Twitter may not be working as expected for some of you. Sorry for the trouble. We're aware and working to get this fixed."

Platformer reported that the fiasco occurred because an employee had accidentally deleted data for the service which sets rate limits, and the team responsible for that had left Twitter in November. Since Musk took over the company, employee numbers have fallen more than two-thirds, from over 7,000 to around 2,300 – per the billionaire himself.

Users were still able to post by scheduling tweets a minute in advance, which Dorsey also referenced, saying: "Twitter went from real time to 1 minute delay," and joking: "What's happening a minute from now?"

The Twitter cofounder also responded to one user who quipped that Musk's controversies had helped promote Nostr more than anyone else, saying: "Thank you Elon!"

Dorsey's criticism of Musk is made all the more notable because he previously cheered on the Tesla CEO's acquisition of the social-media company. Last April, he tweeted: "Elon is the singular solution I trust. I trust his mission to extend the light of consciousness."

Dorsey also continued to hold a stake in the company after Musk's takeover, to the tune of 2.4% or around $1 billion, per an SEC filing.

Twitter did not immediately respond to Insider's request for comment.