The price has dropped from $150/TB-month at inception to $1/TB-month with Deep Archive. Now competitive with RAID storage.
That's my point. You can't actually state the price per TB is N, you can just estimate it and hope it doesn't exceed the estimate. For some companies and scenarios it doesn't matter, for others it's significant enough.
I believe Wasabi currently charges $5.99 per tb a month which is pretty reasonable imo.