If you have to pour gas down the carb to get it to start after setting a few days, that is not a carb specific problem. I have seen numerous fuel injection systems have a stuck check valve that lets the system drain. And that happens after just a few hours. You then either have to crank and crank and crank or sit and cycle the key until the system pressurizes. Either way, there is only a single component causing the problem and neither requires a complete system change to address.

But the problem would serve as good an excuse as any if one just wants to install an EFI system.