[em-bee]

you can use workspaces for that. for comparison, gnome on linux doesn't even support minimizing windows any more. you move windows/apps that you don't want to use right now to a different workspace.

[wtallis]

You can also hide an entire application rather than minimizing specific windows. It'll unhide when you switch back with cmd-tab.

[hiroantag]

gnome does do minimization fine but it's in the tweak tools. probably the first thing I change setting up a new system