And thereby increasing safetyWhen you just have one mixture control like on a thumper, a carburetor isn't necessarily a deal killer as long as the specific fuel consumption is ok and the pilot understands the process and procedure. In fact it can be (spelled USUALLY IS) routine and normal. When you have more mixture controls it becomes more of an issue because more time is required away from other duties. Some engines have a mixture control for each cylinder or a single mixture control is affecting multiple cylinders and some aircraft have multiple engines with multiple scenarios, it gets to be that the time required to attend to the engine(s) is excessive especially if something abnormal happens. The computer in a EFI in such aircraft lessons the duty load on the pilot and allows the pilot to spend more time enjoying flying.