Re: Be much more interested in...
>Hence why most other countries electrical systems do not bother.
Suspect the real reason is time, cost and inertia!
Once you've agreed a Standard, got it deployed to millions of premises and people have been using it for 70+ years, it is difficult to change; although not impossible, remember the change over in the mid 1960's from coal gas to natural gas. Also whilst there may be benefits, the probably don't outweigh the significant costs of change.