Osterwalder's observation that formally handing a validated idea over from a "testing team" (the group that ran discovery and validation) to a separate "executing team" (who will scale it) tends not to work well in practice. He compares it to how startup CEOs almost never voluntarily declare their own founder phase over — compare Steve Blank's Creator vs. Entrepreneur Distinction and Growth-Wave Succession Principle, which describe the same reluctance to hand off ownership as a venture matures.
The practical implication feeds Organizational Landing Pad for Scaling Validated Ideas: a landing pad isn't just an organizational slot to move a validated idea into — it also has to resolve who continues to own it, since a clean team-to-team handoff at the scaling boundary is not something he's seen work.