Not just Jira. It's all Server products.

Here is their blog post: https://www.atlassian.com/blog/announcements/journey-to-clou...

I'm a fan of Jira (don't judge), but yeah, this is a death sentence for Jira as a company.

In your (and my) shoes I'd be researching alternatives ASAP.

What self hosted alternatives exist?

Jira has finally become a fully self-correcting problem.