Same here. My only complaint is I wish there was a way to make apps floating by default and then you would specify which ones you want tiled.

IME a lot of apps are easier to use in their default state. I really only use my web browser, text editor, and terminal in tiled mode.

You got me thinking, and this seems to work for me. I didn't test if the order of these blocks matters.

    [[on-window-detected]]
       if.app-id = "com.github.wez.wezterm"
       run = ["layout tiling"]

    [[on-window-detected]]
       if.app-name-regex-substring = '.'
       run = ["layout floating"]

When exactly do you need floating windows?

- a happy ion2/i3 user since forever -

When you want to quickly use apps without navigating away from your tiled workspace.

Especially transient dialogs, e.g. wifi/file picker. I would create rules in sway/i3 for those to keep them floating.

I've written at length about this topic on HN in the last month, so I'd hate for it to seem like my lil hobby horse, but something I've come to appreciate about the conventional "stacking" window solution of Windows/macOS is that it has a good answer for apps you briefly use.