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For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.
When it comes to prices, boosting Netflix's offerings could allow it to charge customers more. But if viewers find they are paying for one streaming service rather than two, it could cost them less.