I can't take that blog post seriously for one second. The FCC doesn't care if the systems are "too low-tech." There are many local public access channels out there that are using technology that is much more "low-tech" than the 4000 and Jr. Plus there is absolutely no sources given on that blog. The last sentence makes me laugh:
When the 4000 and Junior are put out of service on March 3, The Weather Channel will not have any more weather and computer systems that came out in the 20th century.
Just a few lines up, the blogger stated that "About 60% of the 4000 systems in the country were replaced with the Weatherstar XL between 1999 and 2001." The blogger acknowledges that the XL came out in 1999, and then contradicts that in the last paragraph.
Fail.