I'm in the java ecosystem, so YMMV.

- Automatic spring service detection

- Debugger (remote, local , with access to state, stack and ability to modify the state while stepping through), though I assume this is possible with neovm?

- built-in profiler

- can run individual tests seamlessly

- understands bytecode enhancers like Lombok

- Find Usage, find symbol, language specific navigation, showing class hierarchies, going up/down the hierarchies etc (maybe in conjunction with LSP, other editors can do a decent job?)

- Advanced refactoring (extracting classes, interfaces, inlining functions, extracting functions/methods)

- built-in database explorer

- built-in Git support (I have struggled mightily with VSCodes git interactions - but this might just be an individual preference)

- markdown/html previews

Basically, I barely have to get out of the IDE.

My problems are mostly with the language servers. I've always found them to be slower, consume more resources, and provide worse results compared to the equivalent JetBrains IDE. I've tried Python, Rust, and Go within the last few months and found this is still the case. Go is the worst of them, on larger repos gopls will easily consume 3-4x more memory than GoLand with far worse responsiveness on completions.

The built in debugger & profiler are the big thing above LSP equivalence for me. I know it can be done, but it's not the same.

We're not missing anything, or at least not anything I actually miss. I had a previous supervisor who chided me for "not using an IDE" because I was using Emacs -- Emacs! -- and insisted I should use something more featureful.

First, that doesn't exist, and the notion's laughable.

Second, I have every feature I actually want to use in Emacs (and Zed and even *vim), and have no reason to believe that any random bullet point someone might come up with 1) doesn't exist in those editors, or 2) that I'd use it anyway.