Hi Lawson Sparks,
Thank you for reaching Microsoft Community and apologies for the inconvenience this has caused you.
May I know what Windows version, edition and OS build is your Surface Pro 8 running on right now? To check, go to Windows Settings > System > About.
Updates are placed or provided to our devices to keep them secured and also to help them continue running smoothly. I'm not sure what happened to on your device why it caused a drop on the performance but please try first checking for the Surface drivers' health through the Surface app and run the Surface Diagnostic Toolkit also as this would make some checks on the device and its system. See: Fix common Surface problems using the Surface app and Surface Diagnostic Toolkit - Microsoft Support. After running the tool, go back to Windows Settings > Windows Updates and check for updates again to make sure that all updates available are installed including Optional updates then observe if the performance of the device improves.
Let me know how it goes.
Kind regards,
Marrion