I used Zed for a while. The biggest performance improvements I noticed, compared to VS Code, were in start-up times and the opening of files. Sure, Zed feels snappy in those areas, but I feel VS Code is simply not that bad speed-wise when it comes to everyday coding. Especially, in the era of M1 Macs. Zed may win the battle in the longer term, but I feel slow performance has to truly annoy the fuck out of the user to convince them to make the switch. Right now, I am sticking with VS Code.