For example, perhaps the best car is the most reliable car. 

Why is this? Well, it seems that your car (breaks down) or doesn’t turn on always at the most inconvenient time. Tail events (super rare events), when you need it the most.

For example, the worst time you don’t want your car to break down (or not turn on or work) is during a blizzard or snowstorm.

Same goes with airlines– perhaps the best airline is the most reliable, the *LEAST* likely to get delayed, rescheduled, or having flights get canceled.

Or in IT– we all know that uptime is the most critical metric.

So perhaps it is a bad idea to use beta software– the bugs make it unreliable.

Maybe also with blockchain; the best blockchain of the future will not be the fastest or the ‘best’, but the most reliable?