Replace : "You should typically use fewer than 32 threads unless you are using NVMe (Non-Volatile Memory Express) disks."
With: "You should typically use half the number of machine cores as threads. For example, if your machine has 16 cores, then you should set the concurrency value to no more than 8 threads."
 
Note: This is going out with 5.0.15 now(due to recent rc2 candidate). It would be good to also update 5.0.16 version where it was initially targeted.