Yes - I am in New Zealand, so we have the same environment.
What I do know about digital is that it dumps a lot of noise into the earth as well.
I basically run all the signal amplification ( head amp, preamp, power amps ) through one line from the mains board, and run all other ( digital, turntable power supplies ) through a separate line. I like to keep all amplification on one line to minimise earth loop noise.
I had a bad experience from an Australian distributor, when I picked up some stock off him, we ended up with a blown amp because he had chopped the plug and installed a fancy Furutech with phase and neutral round the wrong way. Unbeknown to the distributor that particular American company uses black for phase, and he made a very expensive assumption. Shudder to think how many amps he’s blown up in OZ.

