hello and welcome to BalWorld!
Probably it would be right if i reply to you
It is not STILL popular, i don't think it was ever popular. It was made for a couple of seasons (maybe 3) only.
But it's SOOO very different that i don't think such attribute as "popular" relates at all.
No, it is not a classic bag in terms of Bal.
City, First, maybe Envelope clutch are, but not a Triangle.
Worth buying, or not is a question everyone shall answer personally.
Here's MY OWN opinion why i have 2 bags and 2 clutches
It is a very unusual bag, it gets most compliments whenever i wear a Triangle (any of my 4).
It is very minimalistic, and it's very eye-catching, head-turning, if i may say so
it is not the easiest bag to use, due to its shape you need to adjust your stuff inside, but once you get used to it, it will be very easy.
this model was not "popular" but it will never be "unpopular", they will always attract attention, and look fresh compared to all the others worn around you, it's hardly possible to meet someone carrying the same bag, and that's what makes them so appealling to me.
My pink is size S, and she is the most complimented bag by far!
My black is not from a standard line as it has no handles, but has a chain, and it's one of my 'save first in case of fire"
My blue clutch is a casual outing one, or "sit inside a bigger bag" pouch
My glitter clutch is
it steals the show whenever i carry it out, at attracts ALL the eyes at the venues, even men's!
In the conclusion i'll add - i will never sell my Triangles, but before you open your wallet, ask yourself: do you see this bag in your collection? fitting in your style? staying and being used after a year? 3 years?
good luck deciding!
p.s. if you have any more questions, or need more pics, please, feel free to ask, i'll be happy to help