What Vsonics do you own and when was the last time you listened to them to come to this conclusion?
The reason I'm asking is that your post got me curious so I brought out a few of mine that I was able to easily find (VSD2S, VSD3S and the GR07BE) and I must say that to my surprise they all hold up very well compared to what's on offer today. This is especially true if one care for a more organic and analog sound with great natural bass than the more digital and artificial one that many of todays sub $100 hybrids offer. For reference I find the VSD3S to be about on pair with the LZ-Z05A and quite a bit more enjoyable than any other Chinese hybrid I've heard in the sub $50 range. I don't remember the price of the VSD3S but I'm pretty sure they were cheaper than the LZ'd. In a similar way I finf the GR07BE to hold up perfectly fine against the Thenzh P4 Pro (that I paid lore for), just different sounding but definitely not worse. The VSD2S is the least good of the three but still enjoyable and they didn't cost much either iirc.
I'm getting the VS3 (or even the VS7) Iceberg now for sure, would love to try those with my balanced sources