Yes, pretty much all my professional and personal work gets done in Emacs. C code, including the full Linux kernel source w/ clangd, python, raku, go, shell, remote editing and language servers with tramp, etc. I read the kernel mailing list firehose as a newsgroup w/ Gnus. I write everything in org-mode including my blog which includes a lot of inline literate code using org-babel.

I used to work on large Java projects and I used Eclipse for that because language servers were not a thing. These days I reckon I could use Emacs as long as the language server is capable enough.