It's been a long road, but I as of r64585 the WordPress core patch to eliminate script/style concatenation is committed to ship in 7.2! Goodbye load-scripts.php & load-styles.php (and all the headaches they have caused). This changeset closes 10+ Trac tickets, several of which…
GitHubScript Loader: Retire script and style concatenation by westonruter · Pull Request #14463 · WordPress/wordpress-developRetires script and style concatenation in the admin and on the login screen. Concatenation has been off by default since r64320, when the assets of the next admin screen also began to be prefetched...