I use speech and braille together, though I can code with just speech if I have to. I rely on audio indent indication and the maximum punctuation setting for speech. Braille is there so I can spot-check my work, quickly find out how a shortened or otherwise difficult to speak variable or function name is spelled, carefully check grouping symbol pairing, and do other quick tasks that speech isn't as good at.

I also use braille for related tasks. It is sometimes easier to use it to read through output in the terminal, for instance, or to check something in VSCode before speech can catch up to what the display is showing. It's also good to read things back when I'm going over logs, and/or have to find details and read them to someone over the phone, such as a tracking number or order identifier. Rather than hearing speech, moving to a word, and reading it by character, I can just read the display.

In short, I rely heavily on speech, and can get by with only speech when I have to. Having braille available, though, makes me more efficient and gives me extra tools to use.

Braille personally helps me a lot. It allows me to keep my speech punctuation down which gives me a way to skim through code faster, while using braille to fill in the gaps when required.

It also allows me to do brace matching and indentation checking a lot easier, but that is definitely something I just grew up doing and am now used to. There are indentation reporting tools for audio/speech as well, I just feel more productive as a braille display owner.

I'm not a dev, but as someone who's a student, I find braille to be beneficial, especially with the field I'm going into: medical Billing and coding. It allows me to easily read the names of diseases, drug names, etc, with ease. In healthcare, spelling it important. Without braille, I'd have a hard time spelling the complex procedures, medical terms, etc that will be used. It also helps with general grammar, at least for me.

I don't use Braille, both because I don't' own a Braille display and because I'm not proficient. I do think that not using Braille does affect me since I have a very hard time interpreting other people's code from speech alone, but I struggle so much with it that every time I try to read Braille I just get frustrated.