Still playing with https://novelwriter.io/
It's more for people who write Markdown in plan text instead of WYSIWYG, but has the lifesaving Scrivener-style of breaking big works up into small documents. (After writing a book this way you'll never want to write one in Word again.)
I'll try to post a better review later, but I've had trouble getting spell check to work. And it's so freeing! No red underlines, just write, don't look back!