If it really does work it wouldn't take more than a year or two to commercialize something so simple in design...
I'll bet you don't see anything come to market.
You are grossly underestimating the nature of regulatory agencies and their restrictions upon power sources.
In the US, anything "Nuclear" requires at least a million dollars worth of permitting process per installation if it's used outside a physics lab with an extant experimental permit.
There have been several teens who built fusion reactors at home, and the NRC has seized their equipment as unlawful. None of them have been prosecuted, and several have been lauded, but the fact remains: they lose their gear due to it being unlawful to operate a nuclear reactor without expensive permits.
If indeed this thing is fusing stuff, it falls under the purview of the NRC and the Dept of Energy, and the required permits put any "proven" tech at least a million dollars and 5 years downrange, simply due to the EIS and radiation containment studies. Plus the vibration and impact resistance tests. Even if NASA were to replicated it tomorrow, the earliest we could put it legally in our homes in the US is at least 5 years after that, because of the required durability testing.
More likely, it would be 10 years, 2-3 lawsuits, and $1B to bring to market, and making up the upfront costs would make it nigh impossible to actually get it installed until the patents expire. So, at least 10 years.
It's not like it's easily enough made to be a typical garage project, either.
And that's before the costs of the extant commercial companies trying to prevent it coming to market, or worse, lobbying to get it outlawed except in centralized large scale plants.