There are for sure way more of these things than "necessary", but they are all different compromises around the same thing. I find that Omega kinda stupid compared to the CHIP, but then there's certainly someone for whom the smaller size is more important than the rest.
People who make them have fun making their own variation of the thing that fits their desires, if there are people to buy them then all is "fine and dandy", that's how the world works.
If a project doesn't suit my needs I won't back it, and I'll usually say why I'm not approving in the unlikely case the creator might have missed something they'd actually have wanted to consider, but in the end they will do what they want and that's what matters.