This post reminds of when I bought my Jeep CJ about 13 years ago. It had a carburetor with about 20 vacuum lines related to various smog components, solenoids, etc. Some guys would swear by the old system and had it dialed in.
I put fuel injection on mine and drove it for over 100K miles without issues, better mileage, cleaner install, constant power at any angle, and passed smog every two years. The EFI wasn't cheap, but it changed the old Jeep to an absolute daily driver. I think the fuel savings alone paid for the parts many times over.
I'm planning to go to the PMA/Pamco set-up and eliminate the full size battery (kick only). It seems to increase reliability, power, simplicity, etc.
I think either can work well, but obviously there are advantages to either approach. I'm just stoked that there are options out there for these bikes.