I started using Emacs late in 1985 on a DEC-2020 running TOPS-10. Before Emacs we used SOS, an editor I'd rather forget and in between we had AMOS an Emacs-look-alike written in pascal that did not use as much resources as Emacs (because it only had a subset of the Emacs commands). If there was more than a handful users logged in, Emacs didn't start. As I am so used to Emacs I stick to it. I tried other editors but Emacs is and always was my editor.