I ran across a thought-provoking post from Chrissy LeMaire asking if we should reconsider SQL Server HA. The post actually asks if you've considered not using it. The default from Chrissy, for most installations, is to use standalone SQL Servers. This isn't to say she's against HA solutions (FCIs or AGs), but that they often cause problems and might not be needed.

It's an interesting position to consider. For a long time, I avoided SQL Server clusters as they were hard to setup with a lot of complexity, hardware requirements, etc., and didn't really provide enough benefits over using log shipping with a second server for me.  These days I have clients with mostly AGs, and they seem to run fine. That being said, Chrissy notes that after she left a job, a network outages caused a bunch of downtime. I could see there being downtime, as the old database mirroring (and the it-will-never-die replication) needed a working network. If you have network issues, you better know how to manage your HA technology's issues.

Read the rest of Do You Really Need HA?