Yeah that depends on the definition of 'ready to use', doesn't it? I plugged my Scarlett Solo in with a cable (30 seconds?, mostly cable tidying), typed "sudo apt-get install Ardour" (3 seconds?) and then that was it. I was 'ready' in less than a minute. I just had no idea how the DAW worked, and that took me .... well, about 7 years and counting ...