A Niche Length
These 3 hour tapes are perfect safety master and archival back ups (never had a drop out, never a tape stretch). We have stored years wort of programs on these, and never encountered some initially feared problems.
I keep anticipating some sort of con, but so far...
(knock on wood)
I feared these would not be a good long term solution because of my prejudices born in the analog age, but I have been proven wrong.
We can store the entire content of DVDs - programs, menu backgrounds, extra features, promos, etc on a single tape (as a back up, mind you). Also, we archive and back up each client's successive programs over a year (or whatever) on a single tape... which makes references in later years much easier to locate.
I also admit we have used these to record/backup long performances (conferences, concerts, etc), and even in the edit suite, they perform flawlessly. Scarily reliable (in that my logical self keeps telling me this can't be working as well as it always does).