> Yes they are, now.

The threading in Slack is abysmal, and trying to keep track of a threaded conversation or seeing conversations inside threaded conversations is almost impossible.

> Use the Slack client

The Slack client is an Electron application running Chrome. Search is still hopelessly broken in the Slack client. Trying to scroll up still causes the "app" to use gigabytes of memory, and it's still terribly broken.