OMG Network was supposed to be the scaling solution to scale Ethereum then, but to me the team missed the window of opportunity and many projects are out there now especially the Optimist Roll-up and Stakware which is being used by DyDX team now and show huge promised, I just have a feeling that the L2 will be a winner takes it all, if OMG team can come up with a real game changer solution with huge marketing and strong backers they will likely be one to watch
You forget to mention Polygon that has a working product with a lot of DAPPS over it.