I know you're commenting on monster taming, but I can't help but mention that time moves differently in our world and the digital one. The ancient era of the digital world in the original setting of LCD Toys seems to contain a deep history of events that could not have entered the time span until 1997, if one assumes that it all started with a virus released not too long ago (for example, Hexeblaumon's profile speaks of an ice age, an "age").

If you combine the existing information in the profiles of Poyomon and Coalemon about the evolution of Digimon, where it is said that life began in the ocean, just like in our world, and that all other species evolved from there (just like in our world), along with the brief mention of an ice age in Hexeblaumon's profile, you get that the digital formation of the land and its creatures went through many strokes of time (yes, just like in our world).