It's important because planes are expensive and have operational lives measured in decades. So, even though companies like Boeing and Airbus are looking at alte

It's important because planes are expensive and have operational lives measured in decades. So, even though companies like Boeing and Airbus are looking at alternative forms of propulsion now (e.g. hydrogen and electric), it would take well into the second half of the century to replace the existing fleet with their newer, more sustainable versions. Realistically production for that kind of plane won't even start until the 2030s at the earliest (and probably in low volume initially). Synthetic fuels will allow the existing fleet to be operated in a more sustainable way during this time. It will probably have a higher cost though. Long term, the low cost sustainable alternatives will probably take over. But as electricity production cost drops in the next decades, so will the cost of using electricity for producing synthetic fuels.