Uh, ah, oh my...
...there's no cringing smily here, haha, a 4 year old laptop. That's like the 2 major risk factors rolled into one, haha. I'm afraid this won't work, but, please, let me know, if it did?!? That would really blow me away, haha. I'm so sorry, though. I still can imagine that I might find a solution that makes it even more compatible, but in terms of speed, well, it still can see plenty of optimizations, I'm sure, but there's only so much that can happen.
I don't want to bore you with details, but the access to image data during the hardware processing is limited and I have to avoid the bottleneck between gpu and cpu. If I find a complete hardware solution to determine where the fluid is in motion, I could limit the amount of data that has to get processed, which would speed it up even more and most certainly makes "endless canvas" concepts possible. BUT then all hopes are gone for older machines to handle that, I'm sure.
Ah well... but I'm happy you're joining in and maybe you come across a working system. I'd love to have your spirit around for sure!