I’m not so worried about undocumented use of SMR in Seagate archive drives. I thought everyone knew they were SMR anyway. Barracudas, I’m not so sure about. Who uses mechanical drives in desktops though?
There’s also Hitachi (owned by Western Digital). They’ve been using SMR in the same way.
But the competitors are SSD drives. For anything up to 2TB, it makes no sense to go mechanical now.