When it comes to fuel systems, the carburetor is the analog option compared to cutting-edge electronic fuel injection (EFI). Both have their advantages and disadvantages, but EFI is a more popular option for newer vehicles.
Now a days, carburetors are usually found on older vehicles or small ones, like scooters. They're cheaper to make than EFI systems and help keep unit prices low. Known for their affordability, parts are usually easier to get a hold of. Carb systems rely on the intake vacuum. It's a strictly mechanical process which requires no electricity. While that might sound like a benefit, it can make it difficult to start in the cold, or at high elevations.
On the other hand, EFI is more complicated. The throttle body is filled with circuit boards and sensors. It's unaffected by the air temperature or atmospheric pressure. Instead, the EFI creates its own pressure to deliver the right ratio of fuel and air. With this sophisticated system, the cost of making vehicles with EFI is higher than those with carburated systems.
Overall, EFIs are more reliable and precise in creating the right ratio of fuel and air. You don't have to worry with a choke or leaking fuel lever. There is less maintenance to do on the EFI system. On a carburetor, you must keep constant attention to it, which can be time-consuming. EFIs have taken over simply for their convenience factor and more fuel efficient ways. Strict environmental regulations have also made it difficult for manufactures to produce carburated vehicles. Unfortunately, it looks like the carburetor is going the way of the dinosaurs.