It can be many things, like large car companies staying away from unproven tech or them demanding production capacities too large to gamble with brand new tech.

It can be many things, like large car companies staying away from unproven tech or them demanding production capacities too large to gamble with brand new tech. This niche motorcycle brand has already established business relationships with Donut Lab, they were using Donut Lab's electric motors. Probably the Donut people easily worked out a release pipeline together in a bar or something, which would have taken years with VW.