-It hampers searches later. You might search for “database” and miss all the references to “db”. -It thwarts anyone for whom English is not a first language. “Config” doesn’t appear in Webster’s, much less an English to Japanese dictionary. -Even within the same routine, you lose time and concentration trying to think whether you used “char” or “chr”.

The benefits far outweigh the time cost of a few extra keystrokes. (Unless you can’t touchtype properly, in which case you should learn.)