Eurovision Song Contest

I hate it. And love it.This evening, in so called semi-finals, I loved Moldovia. Slightly ethnic, good stage show, interesting music with contemporary flavour. In all the acts the scenography (the set) was great. Well down to Ukraine.
My main worry is that the backing appears to nowadays be backing tracks, not a live real orchestra, which results in lack of real live performance emotion. Why?
[well I can think of a number of reasons why, but it's kind of counterproductive]