Familiarity is a huge advantage that ought to outweigh almost anything. If, in the end, you have to spend a lot of time to understand how to write what you want, more time to read what you have written and even more time to read what someone else wrote, then you have consumed enormous amounts of time that could have been spent doing the actual work of telling the computer what to do. The time and attention of a developer is the single most valuable resource when developing just about any software today. Anything which decreases the amount of time it takes to understand a piece of code (whether writing or reading) increases productivity, all else being equal. It adds up.