Hey, Ox Team
A user shared two videos with me and I have already analyzed the first one. Here it is with the timing.

Timing:
0:00 - User shows his working scene with Ox objects.
0:18 - He has peach fuzz, eyelashes and eyebrows in his scene.
0:27 - He says there aren't so many modifiers in the scene that it would slow it down.
0:34 - Here he has disabled all OX objects and shows the performance. Without OX objects FPS = 6.6-6.8 - which is acceptable for him in scenes like this. It's workable.
1:06 - Shows the animation from other angles without OX objects.
1:16 - Activating OX objects. We see that the FPS has dropped to 1.1. It is no longer possible to work and analyze the scene.
1:27 - Disabling PeachFuzz, FPS = 3.7, but it is still not the 6 it was without Ox objects.
1:39 - Turn PeachFuzz back on and see FPS drop to 1.1.
1:44 - Go into the PeachFuzz settings and reduce the number of points to 3. Still the FPS is not lower. So Ox is clearly not loading the scene properly with good fps.
2:11 - Shows the HairFromGuides settings. Only 120,000 hairs.
2:31 - Switches on the face, then shows PeachFuzz separately.
2:50 - Show PeachFuzz separately at FPS = 500 with no problems. But this is without animation
3:00 - Says he clicked something wrong and figures it out. You can skip this moment. Nothing important there.
3:18 - Clicked on something and FPS is 250-300. .
3:29 - Says he'll save the scene and experiment some more.
3:40 - Testing eyebrow combing. While combing we see 20 FPS.
4:08 - Says editing works fine.
4:18 - But when we turn on animation, the viewport dies and FPS drops to 1.1.
4:20 - Says he started learning Blender and everything runs much faster there.
I will post the 2nd video littlebit later.
Thank you and have a great day
Best regards
Andrew.