But frequently, in technology, the term "best practice" is used where it's not really settled whether it's a good practice 80% percent of the time or only 20% percent of the time.
If you look at the history of industry trends over the last X decades, most of which were replaced by the next trend due to the pain that was eventually discovered, you will find many people claiming the new trend was "best practice" typically mid-way through the hype cycle and before the actual trade-offs become well known.