>>james2+(OP)
I write everything on All About Berlin in a souped up version of Sublime Text. I made my own color scheme for Markdown files, my own linters for the content, a build system to run the static site generator etc. I love just how fast I can move across hundreds of Markdown files, finding and replacing thimgs with regular expressions. It’s a night and day improvement over editing text in a CMS.
I chose Sublime because it was blazing fast in my wee Macbook 12”, which I used until a year ago. Sublime Merge complements it really well.