If I learn anything from Chipmixer or how mixing companies store their customer's data while they claim the opposite, it is unwise to assume nothing can go wrong at all.
Unless you're somewhat informed beforehand, we don't yet know what information was ChipMixer keeping in their hard drives. It could be anything, from 4k movies to several blockchain full nodes.
So, it's just false to argue they were keeping customer's data.
That's confirmation bias at its finest, to put it lightly.
You assume the worst for business A, all while assuming the best for business B. No business is a saint, that's the cold harsh truth.
4k movies? Why not 4k porn? That's a silly argument. We're not talking about Netflix.
You didn't read the whole thing and the comment @BlackHatCoiner is responding to.
It is one thing to say that business X
may have stored customers' data, it is another thing to say business X
definitely kept customers' data while we have no proof of that. All we know of ChipMixer is that the mainstream media claimed the authorities have seized the owner's hard disks. The authorities never said what those disks contained.