I gave the designer a quick try and it seems there are issues with importing OAS 3/yaml APIs making heavy use of $ref and multiple files, but I will dig deeper into this in the next days and open a bug report if needed.
My team used insomnia for a while. We were on the paid tier. My boss had us bail because of pain points we were having with syncing environments. People were overwriting changes on accident, and it was hard to coordinate.
I like Insomnia more than what we have now, but I wanted to let you know that was the pain point that lost you some customers so you can hopefully address that to avoid losing future customers. :-/
I think something like a "locking" feature or the ability to prevent certain users from modifying certain shared environments would have helped.
We switched to first vscode rest client and now the intellij embedded one at this point, as having the calls saved in clear text makes it possible to just have a request directory directly in the Repository... With transparent reviews etc.
Exporting/importing is just way too troublesome.