The point of that section, which maybe isn’t obvious enough, is to reflect on how eventually-consistent read replicas limit the options of the database system builder (rather than the application builder). If I’m building the transaction layer of a database, I want to have a bunch of options for where to send me reads, so I don’t have the send the whole read part of every RMW workloads to the single leader.
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(OP here).
The point of that section, which maybe isn’t obvious enough, is to reflect on how eventually-consistent read replicas limit the options of the database system builder (rather than the application builder). If I’m building the transaction layer of a database, I want to have a bunch of options for where to send me reads, so I don’t have the send the whole read part of every RMW workloads to the single leader.