- Way too much access to hardware: I wish browsers had less access to hardware due to privacy and security, and I don't know how low level the APIs get, but it's something you can play around with as a random person with a web browser, so that's neat.
- Instant-on - You hit F12 and in less than a second you've got an IDE with a REPL
- Integrated assembler - While I don't think you can inline it, WASM is really easily used: https://developer.mozilla.org/en-US/docs/WebAssembly/Loading...
- Great documentation: https://developer.mozilla.org/en-US/
- Way too much access to hardware: I wish browsers had less access to hardware due to privacy and security, and I don't know how low level the APIs get, but it's something you can play around with as a random person with a web browser, so that's neat.