Once upon a time there were fabulous tools for creating HTML tables.
Twenty years later the dominant web authoring tool, WordPress, has no native table support.
I have never gotten a good explanation for the death of tables.
So I’ll venture a guess.
I think it was CSS. I wonder if it’s just too hard to put HTML’s table model together with CSS.
If this is true then my CSS dislike will double …
Update 2/19/2018: @clarkgoble creates his tables in Numbers then posts into MarsEdit (choose paste and preserve formatting!). I tried it and it works! I also installed the popular tables plugin for WordPress but it’s a poor substitute for native support. I wish MarsEdit did tables, but they didn’t make the recent big update.