I don't agree with you Dick, I think ADSB will be a generational leap forward in technology prety much the same way and comparable to the way GPS has replaced ADF.
Over time GPS became cheaper and more functional, leading to near universal popularity and the demise of ADF.
The cost differential between Mode C and ADSB has been closing steadily, to the point where the obvious choice is to install ADSB in new planes and to replace Mode C units at the end of their life.
Arguing against ADSB is like advocating for VHS Video Tapes when CDs became popular - ultimately doomed by the practicality of new technology.