I recently purchased a mint Discrete 4 audio interface (not synergy edition) with a view to using Thunderbolt with my newly built Computer which of course has Thunderbolt 4 connectivity. I am somewhat surprised that such a high grade interface comes with Thunderbolt 2 connectivity, as this has 2 newer versions them being 3 and 4. It is not useful, as it means I can only use this interface with USB only.