RISC-V is like LEGO, where you can put together pieces to make whatever you want. Nobody can tell you what you can or can’t make, you can be as creative as you want. Oh, and there’s motors and stuff too.
ARM is like Hotwheels, there are lots of cars, but you can’t make your own. You can get a bit creative making tracks, but that’s about it.
AMD and Intel are like RC cars, they’re really fun, but they use a lot of batteries and you can’t really customize them. Oh, and they’re expensive, so you only get one.
Each is cool, but with LEGO, you can do everything the others do, and more. Like LEGO, RISC-V can be slow to work with, especially if you don’t have the pieces you want, but the more people that use it, the better it’ll get and the more pieces you can get. And if you have a 3D printer, you can make your own pieces and share them with others.