Opinion: If the ACA is on its last legs, what comes next?

If Obamacare as we know it is on its last legs, the biggest question that's out there is what comes next? That will be a key issue in 2020. The Democrats running for President are talking about Medicare for All, and David Balat with the Texas Public Policy Foundation says Republicans have their own plan, something similar to what President Trump did with the economy; free it and allow it to flourish.