Perhaps so in FEH, but certainly not so in other hybrid vehicles.

For instance:

While I do not fixate on the LOD for the Prius as I prefer the IGN reading instead, observing the LOD on the HCH-II does allow for fine tuning one's "driving" further because certain operational modes "kick in" at different LOD levels.

For example, the HCH-II engine operates under 3 different profiles, cylinder de-activation, low speed (Atkinsonized profile) and high speed operation. The load varies widely and flexibly from 19% to rougly 65% when operating below 2500 RPM.

Furthermore, the HCH has several regen modes as well. One of which is known as the "hidden regen", and the only way to trigger it ON and keep it there is to observe the LOD range. Doing so, enables one to slowly charge the pack with a minimal impact on FE.

So as you can see, hybrid implementations vary quite a bit don't they?
... really fun stuff.

Cheers;

MSantos