You can, but if Fish's value proposition is ease-of-use, then people who can't withstand that need to be able to use fish easily still. Not being able to run `P

You can, but if Fish's value proposition is ease-of-use, then people who can't withstand that need to be able to use fish easily still. Not being able to run `PORT=5000 yarn start` or `make && ./a.out` or whatever snippet you copy-paste from the web without understanding are going to be a big pain point for newcomers to fish. Don't get me wrong, I'm a happy fish user myself. But breaking backwards compatibility with shells from the past 40 years and then saying "you're doing it wrong" is not how to make easy-to-use software.