Elektron don’t want you to buy one Elektron box - they want you to buy two or more! This is why they don’t have the same features on all of their boxes - its just clever marketing. The A4 board has connectors for multiple outs but the A4 doesn’t have these - you need Analog Keys for that. If your A4 had multi-outs and MIDI sequencing then you’d not bother with a Rytm or an Octa or a Mono…