personally i find myself hoping its more then a back up plan. i find myself curious to see what the performance of the 2017 Honda engine would look like if in a 2018 STR.
maybe we will get a taste of it in winter testing as some sort of base line comparison test.
but surely their 'Plan A' is to do whatever is necessary to help move them towards their true goal of putting a competitive engine into the back of a 2019 RBR car.