I'm sure the inverter manufacturers are working on something. At the start of solar and wind integration, it didn't matter. Large rotating generators were the

I'm sure the inverter manufacturers are working on something. At the start of solar and wind integration, it didn't matter. Large rotating generators were the main source on the grid, and provided stability. We're in a different world with an all-inverter grid control perspective-wise. I think there is also still an information issue. The grid is definitely not point-to-point. It also isn't all generators. You also have loads switching on and off at indeterminate times. There is an overall predictability to it, but not at the phase governing resolution. If you have a local inverter and the phase slows down, you don't know if it is a remote inverter that has over-slowed, to which you shouldn't respond as it will fix itself, or a near-by load that suddenly switched on, to which you should respond as demand is now greater, and needs more supply. With big rotating generators, it doesn't really matter, as they are time averaging with the large inertia to stabilize the load/generator balance.