Yep all grids are 100% the same, yessirreeee.
There are definitely grid designs out there which can NOT handle micro generation. Transmission across transformers is not equal in both directions and many control systems were originally designed with only one direction in mind.
We have had a power outage here for a few hours as a result of the local utility burning down a transformer which was massively backfed due to amount of solar power installed in our area. The specific cause in this case was unaccounted for transformer losses heating up the secondary when backfed and the fans never switching on as they don't measure the secondary. End result was a fire, a poweroutage and then a week with reduced redundancy on our grid.
But that's just one of the issues. If you look at many grids around the world you'll see that the primary side and the secondary side of transformers are not wired the same way. Micro-generation causes problems in some countries and not others due to different electrical codes, different earthing and transmission schemes, and different utility and facility wiring. And god forbid somehow only every 3rd house in the street decides to install solar, the resulting phase imbalance will ensure a steady stream of power outages for the local area.
But hey at least Hawaii is okay.