Hey @zelterNN!
- Yes - those are optional Temporal services.
- No - not that I'm specifically aware of.
- Maybe - version updates generally include security fixes and incremental performance updates, but it's hard to say whether those changes will be noticeable.
When it comes to the logistics of upgrading the Postgres version, I don't think we have an official guide. The general best practice is to simply create a backup of your current DB and load it into the updated one. Let me know if you have specific questions about this process! Or feel free to join our Office Hours every Tuesday and Thursday.