What boondoggle?
You have to define "Star Wars" - most of that is still theoretical (but research on things like attomic-pumped X-ray lasers has progressed greatly).
Most of that was at the time theoretical, and still mostly theoretical.
This is down to the good, ol counter-ballistic trajectory idea. Which has lots of prior history (anti-aircraft, anti-missile).
There wasn't really a "Star Wars I". There was Sprint and Spartan, which as I've heard, worked OK, but that's back to the same sort of thing that's currently being talked about.
Addison