This all kind of rolls into the “Big vs Small Chainring - Same Power” discussion. There are pros and cons to having more and less flywheel inertia.
I think the core requirements will vary from person to person along with their equipment, personal preferences, and event needs. I think in general that the very low inertia in some low-cost trainers is not necessarily beneficial. But I can see the use of varied inertia as something very worthwhile for people to experiment with and consider for their particular needs.
As with nearly everything, there is not one perfect solution for all. The ideal will be different and require some work via testing and/or reading of others experience to make a decision for your own use.