The removal of Launchpad was an inexplicable blunder. The OS now provides no way to organize your applications.
Why would I want my dev tools, audio apps, 3-D-modeling apps, and office apps all jumbled together?
It's as if Apple is trying to catch up to Microsoft in the race to regress.
They want you to search. I probably have 200 apps on my phone and their automatic categorization is good enough for me. Most common ones I just search anyway.
You can still make subdirectories in /Applications.
This is not reliable; it messes up some applications.