> what are you really gaining by using VSCode

The out of the box experience is vastly superior to neovim, you have to configure a lot less stuff.

The default keybindings are not esoteric.

Adding support for a new language is just clicking a button to install the extension, you don't have to configure or install the LSP yourself (or even know what an LSP is).

For me personally, better support for c#/.net.

You can make a nice IDE with neovim and plugins and a GUI but you do have to make it, whereas you just have to install vscode and you are done.