The phrase "adopter phase" refers to the time when people start using or accepting a new technology, product, or idea. It represents the stage when early users begin to adopt or embrace it, and others become aware of its existence. Full definition
To a certain extent the technology is already there but very much in the early adopter phase. (educationbusinessuk.net)
If you haven't purchased a VR headset yet, congratulations: You missed the early adopter phase. (venturebeat.com)
Connected home solutions are still in the early adopter phase worldwide, according to a survey by Gartner Inc. of nearly 10,000 online respondents in the U.S., the U.K., and Australia. (realtormag.realtor.org)