Actually the comment is not substantive. Not telling what is the configuration that creates problems, not telling what's wrong about the Redis connection handli

Actually the comment is not substantive. Not telling what is the configuration that creates problems, not telling what's wrong about the Redis connection handling, not comparing Redis fork based persistence with the alternative in memory systems have, and so forth, is a exactly the hand waving the OP accuses of doing. Very short not detailed criticisms of systems are actually FUD because in complex systems the devil is in the details.