Yes vanadium is absolutely globally abundant. Given the...

Yes vanadium is absolutely globally abundant. Given the historically low price for vanadium pentoxide and it's relatively expensive cost to produce it's no wonder there are so few pure play vanadium producers in the world. Largo being quite an exceptional example, it just hasn't made sense to underpin high capital/operating costs to one metal with limited applications.

Hence KRR's offering being quite unique compared to it's peers, where lower grade is off-set by revenues earned with other products which seems to be validated further under the new vat leaching method.

I believe the medium/longer term outlook for vanadium is a lot more encouraging than the shorter-term. We're yet to see true uptake in the VRFB's space, but for perspective the VRFB in Dalian, China consumes 7,000t of vanadium pentoxide alone (almost 5% of current global production used in one battery). I'd recommend listening to the following presentation from Robert Friedland to get an idea how serious China and President Xi is on battery technologies/renewable as a whole.
 
As for a viable cost of vanadium pentoxide for the sake of VRFB's that's a little unclear, from what I've heard/read anything over $20.00 starts to get quite prohibitive. However, leasing of the vanadium electrolyte does seem to solve is issue quite convincingly (see below for some interesting slides).