I recently attended an open day at one of the major brands in the UK market and mentioned this during a discussion with one of their local sales people.
The comment was made ' we wont be using Cascade now they are part of Toyota' - I'm not sure if this is a group decission or a local one? - but it reflects the kind of knee-jerk reaction which can be effected low down in an organisation without the knowledge of the management and probably to the detriment of their own customers by restricting market offerings.
Did they stop using Pyroban when they were acquired by CAT ?..
Decissions not to use a supplier as they are a direct competitor are in most cases logical and sound - but do we really think that Toyota will have any detrimental impact on Cascade brand, products or service? - if anything if Toyota prescribe the fitment of Cascade products on their own trucks, as their own brand , they will increase volumes, and can decrease prices and pass this benefit to all.

So - should you buy, or should you not?... depends
but this should be a concious, strategic, decission and not knee-jerk reaction. Think many companies probably need to take a view and communicate this internally so everyone is clear