Even without Covid etc., the synth business is very challenging from a supply chain standpoint. The quantities and margins are not great. The highest selling synth of all time was the DX7. It sold ~200k units. Most stuff sells much fewer units. It's part of why you will see several models that use similar parts so that they can leverage some scale. Even if a company manages to combine the BOMs from several models to improve buying power, unless you are Yamaha, Roland, or Korg, it's unlikely that you have enough overall volumes to get allocations from component suppliers. The consumer electronics and automotive are going to be way ahead of any synth company.