If you're a Mac user that cares about user experience, I would like to (aggressively) recommend Shrugs.app[0]. It's a Cocoa/AppKit app, made with macOS native technologies that integrates most of macOS features in the Slack experience. It's the best app in the town, surpassing Ripcord (which is developed in Qt and is ugly and foreign in macOS) or using Slack in the browser (my usual option), or using the Electron client. It's written by Helge Heß[1], which you might have heard about - he has some fun projects like SwiftWebUI[2].
[0] https://shrugs.app
[1] https://www.helgehess.eu
[2] https://github.com/SwiftWebUI/SwiftWebUI