It's often said that hindsight is 20/20. But for one year only, the prescience of Formula 1's engineers will surely be enhanced by the fact that all of next year's planning will be done with 2020 vision.
Before you roll your eyes at that somewhat-contrived pun, there's actually some truth to that. For the final stage in F1's current rules cycle before the much-anticipated 2021 overhaul crashes into the paddock, there's very little change from 2019.
In light of that most - if not all - of the teams will use evolutions of their current cars this year in a bid to pump unrestricted costs into their designs for the final time, before F1's cost cap will ostensibly put creative accounting to the ultimate test.