It might make sense to spend the money if air travel was as dangerous as automotive travel, but its not,
Globally, last year  was the safest since 1945, with 23 deadly accidents and 475 fatalities, according to the Aviation Safety Network, an accident researcher. That was less than half the 1,147 deaths, in 42 crashes, in 2000.
In the last five years, the death risk for passengers in the United States has been one in 45 million flights, according to Arnold Barnett, a professor of statistics at M.I.T. In other words, flying has become so
reliable that a traveler could fly every day for an average of 123,000 years before being in a fatal crash, he said.
Also, remember each new technology imposes potential new risks. The fire issue with adding new electronics is one thing (but likely easily mitigated), but there are also a number of security problems with the way these new tracking standards, such as ADS-B, are being implemented. There was a Defcon presentation last year about just how bad these changes are from a security POV (think...no encryption or authentication of data that planes will be sending and receiving under current Next Gen air traffic control schemes).