It's probably some years off; there's something of a roadmap on how to do it, but crossbreeding it in takes quite a few years, and something like CRISPR usually means a lot of testing of the engineered variety.
I think because you either have to peel them or cut them in half and scoop them out rather than pop them in your mouth? I don't know. I never had an issue peeling them. And I think red grapefruits are very tasty.
They even make special spoons for it! When I was a kid, that was how I thought you were supposed to do it. My parents did not teach me grapefruit properly.
I'm not seeing the issue here. They're looking into engineering a grapefruit that people like me on those medications can eat safely. It will make our lives a little better if we really like grapefruit and can't eat it. What's the problem? People get hypoallergenic cats.
If you eat grapefruit on a narcotic like codeine it "interferes" by giving you a much stronger buzz. I believe that's the recreational use the other person was talking about