Zyobot
Just a time-traveling robot stranded on Earth.
That's pretty distinct from the 700s-800s Byzantine POD you quoted, but to answer, I asked the same question myself on here a year ago. Forum consensus seems to have been that the KMT still has big issues to deal with - severe corruption, land reform, food shortages, the remaining warlords, etc. But it would also avoid the absolute calamities of the Great Leap Forward & Cultural Revolution, so China will ultimately almost certainly be in a somewhat to much better place economically, demographically, politically and psychologically by the '80s-'90s (much less the 21st century) compared to OTL. Chiang would have to try very, very hard to do any worse than Mao.
I actually asked a related question a ways back, though it leaned more into diplomatic relations with the US and its effects on trade policy down the line, since the lack of mass-offshoring to a communist dictatorship that's acting in bad faith would dampen anti-globalist and protectionist rhetoric. (But probably not remove it entirely, as China would still become a manufacturing powerhouse with loads of cheap labor.)
Agreed, however, that a Nationalist China would be substantially better adjusted than IOTL, especially with democratization in the cards after a brief period of strongman rule, compared to a lasting dictatorship that has only partially shook off Maoist excesses.
In 1923, Franklin Delano Roosevelt sent a screenplay he'd written for a prospective film about John Paul Jones to Paramount. They politely turned it down. But they pretended to entertain the idea for months, because they didn't want to make him into an enemy. (His family was wealthy and powerful, and he had enough pull to put his screenplay directly on the desk of Adolph Zukor, the big boss over at Paramount.)
Suppose they hadn't turned him down? Suppose FDR had become a screenwriter for paramount, delivering historical epics and dramas for them? Even if he doesn't really change the history of American cinema in any big way... this means he won't go back into politics.
Interesting, I don't suppose you have a reference handy? Did a bit of searching myself and found this via Reddit, though it doesn't tell me much about the screenplay itself or the process of negotiations you describe.
Anyway, even if Roosevelt still became a screenwriter, are we sure he wouldn't enter politics later? Because I know of one president who started off his career as the famed "cowboy actor", but later became governor of California and eventually, President of the United States at an unusually old age. (Well, at least until Trump and Biden bumped him down to third-eldest, anyway.)