VSCode has been good enough for markdown blogging for me. Hugo compiles pages on save so its quick to iterate. The markdown preview plugin brings same experience to misc markdown editing.
No new editors to learn and one gets instant access to copilot etc.
I just like keeping all my writing in one place, separate from coding. Obsidian gives me that focused space, and I’ve set it up with a nice font and minimal theme that fits how I like to write.
Why would you need copilot for blogging? Isn't the whole appeal of a blog that it's something you, a human created?