I watched videos of it on YouTube to see what it was, when I read your first post about it. If this is what you mean:
View: https://www.youtube.com/watch?v=JOxkgS_VAVk
Then I most definitely didn't have that. There is zero chance I wouldn't have noticed that, or not been bothered by it.
That's a severe version of it - but it's usually significantly less severe than that.
That particular location IS very prone to the stuttering, however - and there's no way you completed Fort Deadlight without at least some stuttering. I don't think I've personally experienced it being as severe as in that video - but there are times when it can be pretty bad.
Unfortunately, the issue is hard to replicate with ease, as it happens somewhat sporadically and seems to be very location dependent.
It first starts happening in Port Maje - but you can be in that location without issue for 10-20 minutes. However, eventually, it WILL start happening - especially after playing for a few hours, at which point the frequency will increase.
Once it starts - it's a ~1 second stutter that will occur every 1-2 minutes on average. Sometimes more frequently, sometimes less frequently.
Worst places would be Queen's Berth (especially the initial area) and Deadlight. If you want to test it thoroughly - you can go to the waterfall/mill area in Queen's Berth and focus on the animation of the mill. If the animation is fluid without the 1 second stutter for, say, 20 minutes in a row - then I will accept that you don't have it.
Many players never notice it - and it's the sort of issue that can be overlooked during normal play.
Sadly, it's not hardware related - it's related to GC in Unity.
I've spent literally weeks trying to find a solution for this. This includes things like spending 10 minutes staring at specific animations (like the mill) at least 100 times across multiple tests. This is because it sometimes takes that long before the issue starts happening.
I've tested it across multiple systems, including different CPUs and GPUs - and across different operating systems, including Linux and several Windows versions.
I've tested it across multiple patches - including PoE 2 release version, the latest version and everything in-between.
I've tried every single "solution" on every single forum I could find, including spoofing a lower amount of CPU cores, using Special K injection, fiddling with VSYNC and every other option in the game. Endless trial and error.
It's not unique to PoE 2 - it's just particularly noticeable in that game. The exact same thing happens in PoE 1 in certain locations - it's just less frequent and lasts for less than a second in that game.
I personally played 50 hours of PoE without ever noticing it. I only noticed after going back to PoE to test for it specifically, as I suspected it was a Unity issue.
The only PoE 2 version I haven't been able to test is the console version - but I'm 99.9% certain it will be there as well.
Just count yourself lucky you completed the game without noticing it