Patreon is stepping back, and that’s great. But there announcement prompted me to do something about supporting the podcast, and I’m not going to change that.
I'm late getting to this, but I would say it depends partly on which CMS you're talking about. I almost always compose directly in Known, and almost never compose directly in either WP or my main site, which runs on Grav. For WP sites, I usually use MarsEdit, which has just shipped version 4 and which is really good and Mac only. For Grav, I tend to compose in Byword and proofread in Marked2.