I'm worlbuilding a low fantasy inspired by the dark ages something like 6th to 9th century in our world. The geography is completely different with one supercontinent containing almost all the landmass. And plenty of states & tribes inspired by those in our history: Phoenicians, Mycenaean, Han, Dravidian, Scythian, etc.
I have a person that travels a lot working as a mercenary cavalry, caravan guard & trader. In his travel he brings back many "technologies" to their tribe, such as blast furnace, Archimedes' screw, ballista, improved plough, silkworms, rice, composite bow, water buffalo, ostrich, writing system, etc
The new "technologies" remain in use only in his clan, while the rest of the tribe views them as a mere curiosities.
Is it possible for the tribe to ignore useful technology?