Whenever I hear something like "we should convert to X because it's so much better than Y", I am reminded of what happened to Henry Ford.
He had to decide on what kind of engine to use for his new automobile. He had several choices, including electrical, steam, diesel and gasoline. Steam was discounted for inefficiency, electrical for battery capacity (still an issue), so it was down to diesel and gasoline (petrol).
Furthermore, he could choose between using petroleum diesel and bio-diesel, as both were available and usable at the time.
When looking at all the options, gasoline turned out to be best because
a) it was far cheaper than diesel (it was a by-product of making diesel)
b) it was far more available than bio-diesel (vegetable oil was harder to make in quantity at the time than diesel)
c) it cleaned up the environment because gasoline was being dumped as a waste product of making diesel.
So, the best solution at the time, cheaper and greener (using up all that waste gasoline) was to make his car use a gasoline engine.
Now, a hundred plus years later, it wasn't true, it's not cheaper, and it's certainly not greener.
Pitot tubes, vaccum gyros, pressure altimeters, and little balls in a curved tube of glass have been proven successful at giving the pilot sufficient information to keep the shiny side up, and continue to work if the electrical system stops working.