If you're considering Heroku, don't automatically dismiss it because of all this. For one, it's unlikely your site/app will ever be as big as RapGenius. That's not a shot, just reality. They ran into problems as an edge case. Is Heroku and their architecture at fault? Hell yeah it is, but I have faith that they will fix it.
Why?
Because I really think that when push comes to shove, Heroku was actually trying to do the right thing with the changes they made and perhaps didn't consider or understand some of the ramifications of the changes they made to the Rails community. They may have fallen in love a little too much with the new node.js hotness and the like. Their CORE audience is startups/new business where Rails is very popular and they understand what this has done to their reputation. If they don't address this in a serious way it will damage their business severely.
I don't personally use Heroku but I have used it in the past and would not hesitate to use it on an appropriate project.
Why?
Because I really think that when push comes to shove, Heroku was actually trying to do the right thing with the changes they made and perhaps didn't consider or understand some of the ramifications of the changes they made to the Rails community. They may have fallen in love a little too much with the new node.js hotness and the like. Their CORE audience is startups/new business where Rails is very popular and they understand what this has done to their reputation. If they don't address this in a serious way it will damage their business severely.
I don't personally use Heroku but I have used it in the past and would not hesitate to use it on an appropriate project.