I personally would leave it if making a next update, and if there were negative feedbacks just set it off Standard leave it a optional setting  :) less work and risk to Damage something. Often complaints do not really refer onto the right directions, could also be cause due wrong handling of the application it self. Allot of users are new or have no deep experience. So might be better leaving the cache optional, might save another drama LOL  ... one second longer render and they will make a ticket spam !