There is CLI command to set up Redis as backend for Magento cache:
$ ./bin/magento setup:config:set --cache-backend=redis
Does any CLI command exist to switch off Redis as cache backend for Magento?
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Unfortunately, As far as I know core team did not had insight of implementing this, you can check the class implementing it to see if it is otherwise -
Your best bet would be removing the cache node from env.php where child has value "Cm_Cache_Backend_Redis" and clearing config cache.