“Only for the time it serves you” should be added I think.
I had the same experience in early 2019 when Atlassian reached out that they wanted to implement there own Jenkins integration app. The PM at the time did have the decency to reach out and we talked multiple times, now the two apps could co-exist and how there app would be unsupported and customers could move to me to get support.
In the end it was an empty promise. Atlassian is fully supporting the app, and also making sure its more prominent in Jira then my app will ever be allowed to be. And every time I reached out to the PM to continue the discussion or get help on Compass and Forge, my mails where not responded on.
In the end I was lucky that Atlassian messed up a couple of times in their app that allowed me to keep about half of my customers. My install count on the marketplace dropped from 3000+ pre Atlassian app to 1600+ now.
So in the end it worked out for me being able to keep my app successful and I was able to find some Atlassians that keep to their word and where able to help me out with Compass and Forge.
But in this case I read it like Atlassian is not just taking inspiration and only taking on part of the app like they did with me, but instead taking on inspiration and becoming a full competitor of the existing apps. And in this case, no matter how good the existing app is going to be, Atlassian will have a leg up because they can place the app within the products for marketing and ease of getting started with them.
Please Atlassian Please do not rip the great out of this ecosystem and keep to your core so partners can also exist and have joy.