5+ year old i7 are potato and would be a massive time waster today. Build times matter.
If you would not significantly benefit from upgrading, it's only because you already have more CPU performance than you need. Today's CPUs are significantly better than first-generation Zen in performance per clock and raw clock speed, and mainstream consumer desktop platforms can now match the top first-generation Threadripper in CPU core count and total DRAM bandwidth (and soon, DRAM capacity). There's no performance or power metric by which a Threadripper 1950X (not quite 6.5 years old) beats a Ryzen 7950X. And the 7950X also comes in a mobile package that only sacrifices a bit of performance (to fit into fairly chunky "laptops").
If I had 100% CPU consumption around the clock, I would upgrade in a heart beat. But I’m working interactively in spurts between hitting CPU walls and the spurts don’t justify the upgrade.
If I were to upgrade it would be for the sake of non-work CPU video encoding or to get PCIe 5.0 for faster model loading to GPU VRAM.
In the meantime, I wanted something more portable, so I put a 13700K and RTX 3090 in a Lian Li A4-H2O case with an eDP side panel for a nice mITX build. It only needs one cable for power, and it's as great for VR as it is a headless host.