What facts are you looking for? I just described the steps from this document: https://docs.microsoft.com/en-us/sql/sql-server/failover-clu... -- specifically, the "Perform a rolling upgrade or update" section. There's nothing else to my post other than contrasting the SQL Server upgrade process to the one described in the article, and musing about my growing appreciation for SQL Server; I apologize if it seemed like it was going to be deeper than that.
EDIT: I realized you're looking for the other PostgreSQL blog posts. Here's an example of two recent HN posts about PostgreSQL issues that I pulled out of my comment history. Both of these blog posts exist because PostgreSQL doesn't have query hints. SQL Server has them; I've dealt with issues like these blog posts describe but they have trivial fixes in the SQL Server world. Nothing to write a blog post about. I don't have a link handy regarding PostgreSQL's txn id wraparound problem, but SQL Server doesn't have that problem, either.
