In reply to Gregory Karpinsky. On a serious note, I believe the whole concept of WP installation should somehow turn towards a single place for WP per server and not WP-per-site (not talking about multisites with their "quirks"). I am using Composer and install WP always in a folder, where it stays separately from the application (WP_CONTENT points to the "app" folder). Then, why can't I have the "wp" folder somewhere in /usr/local/wordpress-{version} and just use it from there?