[inimino]

> temporary loss of productivity for the payoff of increased productivity later

I don't think the numbers add up. If you like tweaking things, it's a kind of hobby, which I totally get. I used to enjoy doing this when I had fewer responsibilities and demands on my time.

However, you can't really know if it's increasing your productivity, and I don't think that's a good justification for doing it. There's nothing wrong with tweaking things just because you can and you enjoy it.