Did they say nMP was a failure or is this an extrapolation by some at this forum (e.g Aiden)? They said that the cylinder did not have a sufficient thermal headroom and that it did not suit all users. They did not specify for what the cylinder is lacking but I guess for AR/VR developement. A failure for a commercial company is when the product does not provide a profit either directly or indirectly through other products. I have seen no such analysis from a reliable source (ie Apple). Thus all we do here is having opinions, which is fine.
The only "failure" apple may have said was that due to the heat issues, they could not upgrade the Mac Pro like they said and that the product form would last for another 10 years.
The product works fine if you don't have the issues with the graphic cards and the freezing. If you take the opinion that Mac Pro is a failure, then you would have to say the same thing about the MacBook Pro 2016 with the limitation of 16 GB of RAM due to battery drain issues since they may be updating it next week instead of waiting until October.
Apple should give those who have a Mac Pro an option to bring it in and pay some to upgrade the unit. I would Like to upgrade my CPU and graphic cards. They should provide an option to do this for a reasonable cost if it is indeed a "failed" product and would be a service to those who bought one, especially when they lowered the price $1,000.