I had crappy Dell laptop that was just under the minimum requirements that ran the game in the 20-30 fps range (outside of 50+ player pvp fights) on medium/low settings on 1366x768, at high subsampling. When it broke right after Morrowind released, I went close to a year before I replaced it with a real gaming PC that runs the game great.
This past week, I fixed the laptop up and give it to my younger brother, and we planned on playing together, but now the performance on the laptop is horrible, it gets 5-20 fps and unplayable input lag on the lowest possible settings with even more of the graphical effects turned off in the UserSettings file, the only "fix" is to lower the resolution down to where the text is no longer readable and turn subsampling to low, which brings the fps up to where is used to be, but it's impossible to see and not playable. The settings the laptop used to run ok now get fps in the single digits, and nonresponsive input.
Was there an update between July 2017 and now that was known to have tanked the performance, especially on low-end systems? The fact that my old PC saw such a massive hit to performance over the past year and a half makes me wonder how much lower the performance my current gaming PC is than what it would haven gotten before ZOS did whatever the did. I'm well aware of the game's poor optimization for multi-core CPU's and its sometimes laggy shaders, so did those get worse, or is there some new issue?