Selecting, resizing and scrolling panes as well as text selection works for me on Linux (urxvt) and macOS (iTerm), don't know about windows but I don't see why

Selecting, resizing and scrolling panes as well as text selection works for me on Linux (urxvt) and macOS (iTerm), don't know about windows but I don't see why not. Using mouse on, works very seamless with the "new" mouse on setting these days.