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Your synthesis is clear and, in essence, correct.
There is, however, one point worth making explicit to avoid oversimplified readings.
PMBOK 7 did not fail because it was abstract.
It fulfilled an important role by recentring the discipline on principles, after years of mechanical use of processes with limited critical thinking.
The issue emerged when that shift was interpreted as sufficient, as if the “how” could be left entirely to the assumed maturity of teams and organisations.
PMBOK 8 does not represent a rupture.
It is a course correction.
It keeps principles as the foundation, but acknowledges a fundamental reality of organisational practice: without minimum structures for execution, conceptual alignment does not consistently translate into results.
The reintroduction of workflows, practices and examples is not a return to rigid control.
It is an acknowledgement that tailoring is only meaningful when there is something concrete to adapt.
Without that baseline, tailoring easily becomes improvisation.
The more explicit neutrality between predictive, agile and hybrid approaches is also significant.
It brings the guide closer to how organisations actually operate, where mixed models are the norm rather than the exception.
In short, I agree with your reading, with one important nuance.
PMBOK 7 helped us think better about project management.
PMBOK 8 helps us think and act with greater consistency.
At a deeper level, this evolution signals a maturation of the discipline itself.
Principles without execution lead to frustration.
Execution without principles leads to noise.
PMBOK 8 is a deliberate attempt to rebalance that equation and to narrow the long-standing gap between intention, discourse and delivery in project management.