Apologies is this counts as necromancy, but I’ve been thinking about this issue as well and reanimating an existing thread seems the most efficient way of bringing this up again.
Anyway, I agree with the overview that there’s no practical difference between these tags as they are now. That being said, as far as I can tell PT2.0 seems meant to refer specifically to the form Twilight takes in “The Last Problem”, whereas UT broadly covers any image where Twilight’s larger and older. However, the first tag has been added very broadly to all instances of the second type of image, and there’s no real distinction between the two as is.
Now, having two tags for the exact same thing is not generally peak tagging practice, so something should probably be done. Broadly, we’d have two options – alias, or make the tags more distinct than they are.
I’d be opposed to aliasing, personally, for two reasons. First, PT2.0 implies
the last problem, which obviously should only go images pertaining to, well, “The Last Problem”. Second, while that would be fixable by just removing the implication, the intent seems to very much have been to have a tag for Twilight’s canonical “ultimate” form, and I do think that having a tag to refer to that form specifically is a valuable one to have. In my mind, it doesn’t seem that different from how
daybreaker and
nightmare star are separate tags – a tag for a thing from canon, and a tag for a thing from fanart only.
Also,
ultimate chrysalis,
ultimate luna and
ultimate cadance exist and
ultimate twilight
gels well with that theme. A secondary consideration at best, but there it is.
Anyway, assuming that we do
not alias, the next question is implications. If PT2.0 and UT stay separate, should the former imply the latter or should they be mutually exclusive? The
nightmare star
/
daybreaker
precedent would suggest the second option, but I could very well see a case for the first as well.