Agreed. Only carb in my experience that hasn't needed a bit of tweaking is dead-stock OEM stuff.
The Eddy AVS2 on my '68 RR is a better piece than its 53-year-old AVS, and with a little cosmetic work, now looks very original.
Functionally, all I did was change the metering rods; that system's pretty clever and not hard to figure out.
For some builds, looking stock has a lot of appeal.
The Holley on my racecar has had a lot of work done to optimize it for its application, for that matter...