Since the early days of the reproducibility crisis, much progress has been made in understanding and improving computational reproducibility and replicability (R&R). What have we accomplished so far, and what remains to be done? I will concentrate on the state of R&R in computer simulations, i.e. experiments on computational models, leaving aside the additional complications of dealing with observational data.The questions I will address include: Should computer simulations be made reproducible? Why? At what cost? To the last bit, or on a “good enough” basis? Can we ensure reproducibility without repeating lengthy computations? Is replicability more or less important than reproducibility in scientific practice? How replicable are computer simulations today? What are the obstacles to better replicability?