I just posted about taking a break. I would definitely write a goodbye post if that time ever came. But that also means I believe I add value or have made real friendships to this place. I really hate it when I think of someone because they left an impression on me and then have to find out they just stopped posting. Like 'don't you think I care?!'
But then again, I've been blogging in communities 15 years ago as well, and I still think of some of these people from time to time. So I know how much of an impression even 'online' people can make on a person.
A goodbye is a simple yet important thing to do/say/write :-) You can't ever know who 'needs' to hear that.
So you have, I have just had a read.
Agree with the above - you never know who will need to hear a farewell, and this courtesy could come back to you in a good way in the future. Enjoy your break, and make sure it's only a break because I demand to be tagged in a real goodbye post :)