Programming language efficiency from a developer's standpoint is not measured in bytes written in the source code, because typing characters is never the bottle

Programming language efficiency from a developer's standpoint is not measured in bytes written in the source code, because typing characters is never the bottleneck when writing code. Even if it were, most code isn't "fire and forget", and so for most code the cost is dominated by maintenance cost, which has more to see with reading than writing code. Languages that are concise are so because they either express information very densely, or express less information (via for example ignoring error handling or making it implicit with exceptions). In practice I find that such languages are much harder to maintain, because the missing information has to be rebuilt by the reader.