I'm actually considering upgrading to 5800x or 5800x3d as a cheap temporary upgrade since the newest generation (which I initially planned on) just seems too expensive given the need for new DDR5, and new very expensive motherboards which will likely need at least another year to mature. So far I've been leaning towards the pretty cheap 5800x (280e vs 450e for 5800x3d) since the difference actually doesn't look that big for real workloads (and since it's an upgrade for a shorter than usual timeframe). Is the 5800x3d actually 60% better in non-gaming to be worth it? If not (as it seems to me) I'm not sure why waiting for the next 3d specifically makes sense.
X3D seems to shine in gaming but likely helps with other code that is not computation-heavy as well. If you don't need AVX-512 or higher memory bandwidth, either 5800 CPU is probably good. X3D is going to be a bit more future-proof, requiring a later upgrade, based on how well 5775C holds up even today.