There are already several good examples by @sidebysidebyside in this thread, but just to reiterate - I’d actually say this is more common than not in all music with clear notation (either slash voices or through-composed parts) in rhythmically diverging parts. The chord symbols usually align with the indicated rhythm in each instrumental parts. The only times I use “global” placements exclusively are in Lead sheets, slash regions and music where the parts are equal enough for it to be sufficiently clear.
Using local chords is fine, and perfectly in line with Sibelius and Finale, but an automatic solution (although I doubt it’s even possible) or better tools for conversion etc. as suggested above would be very helpful.
And a related request which I’ve been thinking about for a long time:
A “Hide chords” property for Chord symbol regions to invert their behavior. This would be extremely useful in situations where you mostly need global chords, but with a few bars exception here and there (either for diverging rhythms or rests) . I usually approach this with “Hidden” property on individual chords, but this is prone to errors whenever I add something in the global chords.