Granted, the internal dynamics were always against Open Power - but then, anybody with any knowledge of IBM history could have predicted that.
Without that, would Open Power have had a chance? No.
Open Power was always a fundamentally bad idea for many reasons. There was simply no way to create the Open Power "ecosystem" that IBM wanted in order to drive comparability with Intel's universality, _as long as IBM was also in the business of selling Power systems_. And critically, IBM made a lot more money from systems than from licensing. If IBM made its Open Power "partners" successful, they would inevitably have succeeded at the expense of IBM Power; and if they failed, it would still have been at the expense of IBM Power's margins. To put it another way: if IBM equipped Open Power licensees for success, the Power business ceases to be attractive to IBM; if it handicapped it for failure, it ceases to be attractive to the licensees.*
Open Power only makes sense if Open Power is actually competing against Intel, and therefore can grow every partner's revenue (at the expense of Intel vendors). But the reality always was that Open Power was competing against Power, fighting over the crumbs from the same small slice of pie.
Was there a smarter way to do this? Maybe, but it would have required IBM to be willing to give up making Power systems itself and sell just the processors or motherboards, like Intel**, probably with a "second source" licensee as many buyers demand that. Or even get out of the processor hardware business entirely and just license the designs, like ARM. Maybe, just maybe, that would have allowed Power to become the defacto standard for the high end, e.g. in HPC - although it was still never going to replace Intel in the commodity server market. But IBM was not capable of such a bold move, because "shifting tin" generates revenue, and revenue, however unprofitable, is how most of IBM middle management is judged.
If all this is true, you might ask, why would anybody ever take a license for Open Power in the first place? Frankly, I think that several companies did it as a "favor" to IBM, expecting similar "consideration" in some other area in return, but never expecting much business from Open Power. (This attitude is not uncommon in Europe or east Asia.) Some did it because they were promised some sort of territorial exclusivity – but that just moved money from IBM’s left pocket to it’s right pocket, it didn’t grow the business as a whole. And some did it because, to put it bluntly, a lot of companies in our industry are impressed with great engineering but lack an understanding of what drives complex markets.
*You can see this same mistake being repeated all over our industry. For example, ever since DDN bought Lustre, other storage vendors have been looking for alternatives to Lustre.
**Yes, Intel has dabbled from time to time in own-brand servers, but always briefly, and never successfully.