True, but when talking MX GP (like the OP) there are quite many 30 +2 on all terrains.
I think that would turn into a humilation so better they don't join yet.
I don't think they planned a separate MXEP electric class to race 30+2.
After FIM WSX 11 min races, the next logical step for Stark will be AMA SX 22 min races, should be no problem for the range.
AMA MX and MXGP 35 min races would be the real test, and once you have much more data on +20 min pro races you know where you're going. Then of course if the organizers chicken out and just introduce a separate electric class they would need to have shorter races to accommodate other manufacturers so it would be easy for Stark.