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.
Medics are often expected to work night shifts, weekends and longer hours, for which they receive extra payments.
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Recurring revenue brings predictable cash flow, stable margins, and compound customer value. Investors love it, but more importantly, it lets you grow without chasing every single sale.
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