Hurl https://github.com/Orange-OpenSource/hurl For those who prefer an efficient command line tool
I've landed on the REST extension in VS Code for development and interactive work, and Hurl for more test/automation stuff. Both take a little more effort to get setup but way more productive than the typical Postman workflows I see.
For any long-term things that would normally be in a Postman collection and distributed to others / outside teams, I usually end up with folder-separated Hurl scripts (similar to your use).
I can totally see how the REST extension is way easier for point & shoot from within VSCode though!