I almost did the same thing. I'm in the process of building a new gaming PC and I still have my good old 1080 Ti from my older PC and I planned on using that again. In the end, because I'm building a PC that's gonna be strictly on Linux and having seen how it performs on that platform nowadays, I'm gonna replace it with something that's more open source friendly.
Because the GPU market is completely fucked, I ended up making a decision I really couldn't foresee. And that's to give the middle finger to both NVIDIA and AMD going for an Intel ARC B580. Can't wait to put my hands on it. It looks like a seriously impressive piece of hardware for its price to performance ratio. I think I'm gonna cherish that GPU like I cherished to my previous one.
Before I finally build it and install my new GPU in my new PC though, I'm definitely going to kiss my 1080 Ti goodbye. And I'm giving it away so it still has years of service ahead of it. Fantastic GPU. Peak NVIDIA, honestly. This was their best and it's all downhill from there.