I love receiving these as achievement rewards but as far as I am aware it’s been a long time since a new one has been released.

Would love to see some new ones coming!

There's going to be a new site layout and it's actively being worked on, so probably not :(

That makes me wonder, what will happen to those achievements? Will the prizes be removed or retired? Or will they work on site themes for the new website that are unlocked by those achievements?

The new subeta wardrobe has a Shengui Guo banner, which is new and not an old Subeta layout option. They're probably aware. You could make a thread in the V2 section?

my guess is they will retire those achievements. They should probably retire them sooner rather than later. They are all a lot of work and while I earned them years ago and got a lot of use out of them, someone earning them mere weeks before they scrap the current layout might be extremely annoyed to do all that work and only be able to use them for a very short period of time.

I don't know the timeline for when the new site will come online, but staff really should consider this.