Well, I wouldn’t say it did nothing. It tied up a lot of manpower. Something like 4 million men died, half of which were from the Central Powers. If Italy remained neutral that frees up at least 2 million Austrian soldiers to be deployed elsewhere.

Again, that’s just the dead. Not the entire force that was deployed there.

In some places in Australia you can even get free rooftop solar. The local government pays for it.