Is the Electra being praised, not for its merits as an aeroplane but the fact that it was the first big piece of machinery in many an aviation career, resulting in no shortage of cheap crews
Throttle response was not particularly an Electra feature, all big props will bite the air with a power/pitch change, there is no waitng for spool-up.
There was a lot of new technology on the Electra and much of it was disproved as well as proved. If you went into ice, you might as well be on three engines and the contol boost/deboost system was never to be repeated on another aircraft. As for comparing the electrics with simpler jets, at least you had the option of having a split-bus if you need it and auto paralleling is a wonderful bit of magic.
They are still around because they made 170 of them