That's because step 4 is really: > 4. Spend a lot of time ripping out FP components i'm less familiar with improving the performance of and replacing them with

That's because step 4 is really: > 4. Spend a lot of time ripping out FP components i'm less familiar with improving the performance of and replacing them with imperative code I have years of experience improving the performance of. The cause of mist if these kinds of things will be dominated by familiarity for a long time.