Feb 17 the first time a major broadcast format is to shut down?

[wa2ise]

Let's see, AM radio has been around since the early 1920's, FM since WW2, and they have never been terminated. Now, NTSC analog color TV, a very popular and successful broadcast signal format, is scheduled to die in a month. Oh, we had many short lived broadcast formats (AM stereo, CBS color wheel, quad sound on FM, FM on 45MHz, and such). But never a 50+ year lifetime standard being killed off.