Presumably the team started with existing methods on their fleet of compute and was forced to develop new ones. While development happens your fleet also grows and your ability to utilize it expands and you end up not going back to ever try methods that are generations behind on your current fleet because the overhead of making it work doesn't justify it.

It's like asking if using the google homepage from 10k iterations ago would perform better than the current version on the present user cohorts. There's just too much invested to justify testing things like that when you can use the time to improve what is showing promise.