I think v4 has a very different message from v1-3. 1-3 seem to be saying value your readers time by writing as succinctly as possible whereas v4 says a shorte

I think v4 has a very different message from v1-3. 1-3 seem to be saying value your readers time by writing as succinctly as possible whereas v4 says a shorter message is more powerful. This may sometimes be the case, but often it is not. Many of the most powerful speeches use repetition and deliberate at length on their message in order to emphasise it. Shortening them would probably have made the message less powerful.