Yes, they are fun. At least in practice the decision to use one or the other would come from variance guarantees. From this view we can define a "practical" me

Yes, they are fun. At least in practice the decision to use one or the other would come from variance guarantees. From this view we can define a "practical" meaning to each one. * blocking: very high variance in operation time * lock-free: lower average, likely lower variance, but prone to spikes * wait-free: lowest variance, approaching zero, cannot have spikes