Hello,
I run into the problem today, I had to use redis cache for my existing wordpress site. what I did, I created new site using ee site create example.com --mysql
Did migrate all my wordpress stuff using duplicator wp plugin, all process was a fun and went butterly after that I realized that I need cache and I want redis for caching.
What I did, I updated the site using ee site update example.com --redis, what happened after, ee re-installed the wordpress and configured the things. My all work has gone 
Any way to only update the cache type?
