My k25 black swift with ghw is definitely one of my most used bags, especially for travel!
Here are photos from Dec 2016 when I first purchased it:
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Here’s a photo I just took for this post (March 2020):
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Compared to swift from other years, I think it has held its shape quite well considering I don’t store it in a special way. I also have the tendency of overstuffing my bag when I travel.
For reference: K25 (2016), B25 cactus (2019), B25 RS (2020)
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Lastly, this is my friend’s vert vertigo k25 (2019). As you can see, her k is more structured than mine ever was.
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Overall, I feel that that my swift leather varies by year. Since you’re looking for a non-slouchy swift Kelly, this would be the perfect time to get it! My swift bags 2019 and onward are definitely more structured and matte. 2016 swift is shinier and feels thinner/softer (not sure if that’s truly the case). I don’t baby my bags, I overstuff them at times, and I don’t use airbags when storing. Being the worst case scenario that I am, I highly recommend a swift k25 because I personally feel like mine has retained its shape
HTH!!!