I just upgraded to a 4090 from 1070ti. Specs are 8600k at 5g, 64g ram 3200, m.2 drives, and rift s.
I was getting 27fps with ASW and low settings on the 1070ti.
With the 4090 I’ve maxed all settings and turned off ASW and am getting 80fps consistently without any dips.
Its truly a new experience. No stutters, smooth, clear, totally amazed.
The 4090 is worth it if your budget allows. Waiting to see how this 7800x3d thing shakes out compared to 13th gen intel. Will probably upgrade cpu next year.