In my experience? Minimal. Although when you buy a single drive for over $1k you’re also not super into cracking it open and repairing things. From what I can tell, it’s like a blu-ray drive, but more complex, and more delicate. Not to mention since it’s tape you technically need a clean room, because dust can fuck up the heads.
If I could source decent drives for less than 10 grand I’d be a huge supporter of it, but us pro-sumers are pretty much left with ebay.