It's going to depend upon your scale, and your architecture. Rearchitecting your application to avoid $10K a month in cross-AZ replication may make sense. Doin

It's going to depend upon your scale, and your architecture. Rearchitecting your application to avoid $10K a month in cross-AZ replication may make sense. Doing that to save $10 a month is likely ridiculous. Migrating between vendors to save a few bucks is generally a fool's errand for anything that's sufficiently complex. Find a platform, commit to it, and then work to leverage resources responsibly within that platform. Remember that "elastic" means scaling down as well as up.