You can try it out. I would say it’s aiming to be a more modern Sublime Text, which is a win to be considered in the same category imo.
The modern Sublime Text is Sublime Text. There is way too much "extra" in Zed to compare it. If anything, it's a new IntelliJ.
Perhaps the same issue that had Zed fail to recognize their GPU also tanked their performance.
I do not understand how one says this with a straight face unless you’ve never used either product. Do you also believe Neovim to be a “new IntelliJ”? That’s the level of functionality out the box, though fortunately Zed does not require lots of screwing with config files to get basic things working.
As mentioned in other comments, it actually outperforms window management in general in many/most cases. Radically flexible and almost never gets in the way