We want to use theme cosmos for our new application in Pega 8.4. But our business wants to have few changes in the existing OOTB userportal. Is it recommended to do the customization at userportal level (using App Studio only)? Will there be any issues during Cosmos upgrades? We tried not to change the user portal but even if we save cosmos userportal to another portal, all the underlying rules and templates are same.
Please suggest on this.
***Edited by Moderator: Pallavi to update platform capability tags***