A “copy all or multiple sounds” command, akin to the copy multiple trigs command would suffice, but from the manual that doesn’t look possible either.
Just imagine working on a tune and once you got that pattern and kit dialed in, you then make 7 pattern variations for it, each with different fills.
As you are doing that, you continue to tweak each sound, making different tweaks in different patterns…
Now you want to chain the 8 patterns together, but they each have different kits since pattern = kit.
With the Kit scheme on A4/AK/AR/MM/MD, it’s no big deal. And it’s more than just convenient. It’s an elegant way to manage sounds that multiple patterns reference.
On DT, however you’ve now got to start copying and pasting sounds from one pattern to seven others.
Some would consider this beyond “inconvenient”.
Furthermore, it looks like you have to use the Sound browser (limited to 2048 sounds on +Drive) in order to even do this. As pg34 in the manual only mentions copy/paste for patterns, tracks (notation), track pages, and trigs. No copy/paste sound.
I wonder if saving the Sound to the sound browser would update it across all patterns that reference it? This might work, but it also might be destructive in a less-than-elegant way that we see in the patch library implementation in synths like Blofeld.