Reverts kind of suck when it's your feature getting reverted, no doubt. But for something as foundational as Postgres, the more reverts the better...
This is a strong endorsement of postgres; it shows they take quality control seriously.
is it really necessary to keep using new version of postgres and to keep developing them? is it not done at this point?
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Better to revert than lose a community that is invested in your ecosystem that starts looking elsewhere. I congratulate the team in acknowledging and doing the right thing. As a developer myself, I know it is a painful thing to do but important to listen to the community.