[megavolcano]

I joined a company that had their application on about a dozen environments in Elastic Beanstalk that would fail for no reason during deployments. When everything went find it took about an hour to deploy, when stuff goes wrong - say goodbye to half your day (at a minimum). The general solution to most deployment issues was to just terminate every instance but 1, deploy to 1 instance and let the scaling policies kick in to replace the terminated instances. EB is absolute trash.