I know this seems like a repetitive question, and one there is probably no good answer to. So sorry in advance to ask what seems like a question that's already been answered.  I am still flying on the previous software (last update, not current update).  My base area is in Marina Del Rey, where I'm surrounded by airports. Are there people on the forum who have updated their software successfully, and are happy? Since it seems there is no recourse to retrograde, I'm concerned. And from what I am reading, it sounds like there are only CONS for upgrading. thank you... and people with happy stories, please let me know if there is something to be gained by upgrading?

If I were you, I would like to upgrade the latest firmware since it may be the fixed of the previous known issue or function optimization.
But it always is a personal preference to upgrade which you can choose to or not.