> It seems this is more a response to external pressure than it is to some new revelation that the projects are infeasible.
I'd say no. I've been personally involved with now 4 companies that were directly or indirectly involved in all that OBOR kerfuffle.
It was certainly a genuine miscalculation on Chinese side, and a very grave one.
An average Chinese bureaucrat knows no more of the outside world than a lifelong gated community dweller knows of "the hood." And add to that the natural incompetence of China's "aristocrat-bureaucrat" class.
In talks with many members of political establishment, I heard very much the same sentiment: many genuinely expected OBOR to be "a walk in the park." To a lot of them, their first first hand experience working outside of China is a complete eye opener.
The common line they thought was that "if Kenya's GDP is zillion times smaller than ours, then we can put zillion times less money on an equivalent project, and still get the same result."
Another one after that is "if it is so much cheaper than in China, it must be very easy."
Some times they get messed up with analogies beyond silly, like in the case of one OBOR official who was estimating costs of road projects in Africa by trying to find physically similar roads in China, and copypasting their costing.
A lot of things in China are done with presumption: "if it's abroad, it can't be worse than in China." That presumption is just so wrong.