That is an informative website yr right.
There is one aspect of aero engine operation that it didn't discuss though: changing air density.
A carburettor engine designed for a wide variety of air densities needs either a mixture lever operated by an expert, or a very complex auto-lean mechanism. In practice these days, manufacturers rely on the first option!
A single-power-lever engine can be operated at the most appropriate f/a ratio at all times, and needs no special expertise outside the factory or overhaul shop. Granted you won't get the theoretical efficiency of a high-end expensive carburettor. But 90% efficiency with no hassles is pretty good for us "get from a to b no worries" types.