does time attack encourage R&D?
Well yes - i guess. To a point.
Let's face it, at the pointy end of the PROESSIONAL game (which i think we all realise is something else) they already know the concepts, whys and wherefores about how to make a car go seriously fast around a race track. We don't need time attack to show us how it done in an absolute sense. But as an amateur endeavour, working within relatively tight budgets - starting with road cars - it's damn interesting to see how people achieve what they do. For me that's what it's all about, and nothing more.
F1 engineers aren't going to be looking at WTAC for any guideance that's for sure.
You have to recognise it for what it is, and the achievements acomplished within the respective arena/budget/context.
Otherwise, you're mixing two worlds that really are very far apart.