The more likely future imo is different forms of dedicated inertia rather than inertia that you used to automatically get from old school power plants with big

The more likely future imo is different forms of dedicated inertia rather than inertia that you used to automatically get from old school power plants with big turbines. Both will coexist of course. Financial incentives for different support systems for electrical grids will continue to evolve in the foreseeable future.