This sounds like a terrible move and will probably force all medium-size organizations I work with to ditch Atlassian. We have the technical know-how to administer data center versions of their products, but we can’t do shit if they force potential customers to pay for a minimum of 40 000 USD for a license per product. Many of these orgs have multiple Atlassian products so this will probably end up doubling costs on…
There's also an automatic import process from Jira [2].
YouTrack has a cloud version now. Unfortunately they used the introduction of this to raise the prices for their self-hosted version. However they do allow migration both to and from the cloud version, and they plan to introduce a self-hosted version of their newest Space product, so it seems JetBrains is more DIY friendly than Atlassian.
JB seem like a better company anyway. It's hard to forget Atlassian's decision to stop rewarding employees based on merit, a system they claimed was created by "white men" [3]. The new system rewards employees largely for following the "company values". Under the company values page [4], they claim one of their values is "Don’t #@!% the customer". Interesting way to show it.
[1] https://www.jetbrains.com/help/youtrack/standalone/Getting-S...
[2] https://www.jetbrains.com/help/youtrack/standalone/importing...
[3] https://www.news.com.au/finance/work/at-work/atlassian-ditch...