I'm a long time Postman user as well, I'm still using the Chrome app version because I like having it open in multiple tabs - I can quickly compare responses from Dev/Prod by switching tabs.
Long-time Paw user here. I prefer it over this or Postman, but I agree that there are horses for courses. Paw lets you easily switch between a bunch of different requests, supports many auth schemes, can import the “copy as curl” right from your clipboard, can generate code for many languages (including curl), has a nice JSON viewer as a tree or as highlighted and formatted text, etc etc: https://paw.cloud
I also like the collab features and ability to save the API spec alongside the source code if you wish. They also have some cloud sharing for teams that I haven’t played with.
Does Insonmia or other REST clients support tabs?