Been curious about this since I would think after 10 years of this game that the devs would get burned out eventually, and Endwalker being like the peak of what they wanted which is the end of a story arc.

and FFXIV have this really strict set schedule of patches every year, I would think that would be pretty on hard the mind after awhile and especially in a 10 year span so far.

I don't know the devs personally of course, I just think its pretty admiring they handled 10 years of this game assuming their team members have been mostly the same unless they shifted devs around at times.

-

It made me curious about something else as well, let say during Stormblood that Endwalker was actually being made aside from Shadowbringers at the time. Does his team actually plan a lot of things out way ahead of time and thus why they can meet Patch Deadlines so easily like that?

Because if so they know how to keep secrets.