We still are not much better at controlling the magnetic plasma containment fields. it ain’t gonna be 2020 unless there is a dramatic breakthrough in magnetic field control in the next couple of years. Then, after the first self-sustaining fusion machine is demonstrated, commercialization of the technology will take at least 10-15 years.
Plus the first wall problem - bombardment by 14 MeV neutrons will necessitate its replacement every year or so. And the problem of tritium economy - basically, every tritium atom create in the blanket must be captured so that it can be recycled and I don’t know of any 100% efficient chemical processes. And neutron economy - unless you have a fertile or fissile blanket, every neutron out of the Deuterium - Tritium reaction must be captured by a lithium atom.
I suspect that these problems must be faced by inertial confinement schemes as well.
And we’ll just call my grad school advisor ‘Al’ - you may have worked with him.