Is there any statistics on how long it will take to in place upgrade SQL Server 2014 to SQL Server 2016 on a server with 1000+ databases and 10TB of storage? How long it will take to install subsequent 2016 service packs? Is there a way to optimize those installation times by configuration?
The goal is to minimize maintenance windows
Update: Let me clarify a question. All production updates will be tested in QA environment, the question is not about it all. I'm asking about known to you options to optimize upgrade duration. I'll search for those options myself by measuring upgrade time in my environment, but if there is a "previous art" - please share.