You wonīt find many electrolytics in the sound path, if any at all, in modern designs.
The very few you do, as in that 100uF one in the power amp feedback path, are there because they are the sensible option.
As in: yes, you can replace all steel bolts in your car with Titanium ones, and the bolts themselves will be "better" (and definitely 100X more expensive) .
The Million Dollar question is: will your *car* be better?
Will a 100uF metal film cap be "better" than a similar electrolytic?
Well, it will probably measure better in some aspects .... doubt any difference will be audible and thatīs the point.
Doubt (in fact I am quite certain they donīt) any Pro stuff, any brand, uses 100uF metal films there instead of electrolytics, maybe thereīs some reason for that.
Now on "audiophile" stuff, be my guest.
"Way more expensive=better perceived sound" .... I wonder why
In a nutshell: donīt overthink it.