After spending about 2.5 hours completing the SU6 Update, I played with it for 30 minutes with all addons and settings I last used in SU5.   Although I couldn’t tell what differences are exactly made, I am pretty impressed that the SU6 is quite good.

Regarding the update process, I got this and that issues as in the last few updates.

In order to complete the whole process, I quitted and reloaded MSFS and rebooted my PC a few times.  Also, I cleared all the addons in the Community Folder before the update process.

I am using Steam.  Hope above info also helps with those who are using MS Store.