Thanks for the advice. Most of the comments are short and won't be a problem to type them in again but some of them can become pretty large, especially those ones that require explanations or details. Those are a good idea to have them saved. Same goes for posts, except for those users who just write posts in Twitter style :P
As an alternative for saving my posts in an external editor, I just use an alternative to steemit.com . Probably you heard of http://busy.org already. I'm using the beta version. Don't get me wrong, I'm not pushing you out of steemit I just point out an alternative