Compared to the potential of the MMP the alleged "countless failures" are nuts, nothing, nearly not worth mentioning.
I've always been sceptical regarding the Crossflo trip, because these investments will never have the return on investment for me as a shareholder as the MMP will/should have (something I wrote severeal times to the company while RG was on board, but never got a reply to).

Therefore my point is:
If the MMP is all we are sitting here, why bother because of any tiny investments which might come to fruition in some years or decades? There is nothing the BoD can and should do because the show is run by TPL (Fortunately! Imagine the BoD would have had to build up a similar organization like TPL did...ouch....).
So, you're demanding facts? I'll give you the only relevant fact re: PTSC:

Final and comprehensive Break-through at the USPTO.

And then let's talk about revenues.

GLTY