https://lgbtqia.fandom.com/wiki/Sapphic had never heard achillean either. I'm glad I did tho, it helped clear up an apparent inconsistency with the term lesbian. Neat!
I'm mostly straight & cis, but I know Hexbear has a large queer presence (I love my trans comrades!) so it's actually surprising to have not encountered it much here. I guess that's what I get for staying out of /c/anti_cishet_aktion like I'm told lmao.
Yeah, it's a much more useful term for me tbh. I prefer it to lesbian