I recently picked up a 3070Ti on sale at a local shop. Posted my RTX 2080 on Facebook Marketplace for 2/3 what I paid for the 3070 Ti and had a buyer within 30 mins. So basically it was a $400 CDN upgrade for me. It was worth it. My current PC is upgraded for the rest of its perceivable lifespan.
In other games, the performance difference is huge - an easy 30% performance improvement across the board, sometimes even more with games that support DLSS. I don’t really see any noticeable difference in MSFS since I’m CPU limited (Ryzen 5950x). It’s about the same, although in some cases I do find performance near the ground to be less stuttery since that tends to be more taxing on the GPU.
Unless SUX really unclogs the CPU bottleneck (it doesn’t from reports so far), a GPU upgrade from a 3060 is probably not worth it. It might be for other titles, but not for MSFS.