If you drill down in that PJM article and read the Aviation Leak article, they are talking about parking this telescope at LaGrange Point #2 (a million miles or so from Earth) and operating it there for only five years.
We have absolutely no way to retrieve it from L2, (even if the shuttles were still flying, they cannot go beyond low earth orbit) or send a repair/service crew out that far to fix it when it breaks.
Or, like the Hubble, when it starts out broken.
At a Langrange point the telescope will find itself in the company of dust and rocks. Not ideal.