Yeah sharing suppliers/tech has made so much of a difference to sales.....or not.
Jungheinrich sales ditched when MCFE supplied engines and transmissions? Nope.
MCFE sold a **** of a lot of the EFG 4-5 ton models, more than Jungheineich were selling at one point, obviously very bad for sales!?
MHI (MCF) joint venture with Nissan on IC 1-3.5 ton in 2004 was terrible for sales on both sides? Nope.
Rocla sales have always been less to their own direct dealers/customers than those sold through MCF....no issue there.
And the joint venture of MCF made little difference to sales of Cat branded trucks, which have always outsold Mit versions.
Cat trucks post-1992 produced by everyone other than Cat I.e eagle picher, royal tractor, daewoo, kalmar.....!
Jungheineich product sales through MCFA doesn't seem to be a problem.

As pointed out by others this is not a new situation and will have little change and I very much anyone will lose here, just like in all of the previous occurrences.