Will NEMA Premium transformers continue to be offered?

Frequently Asked Questions Distribution Transformers 

NEMA premium represents energy efficiency levels that are higher than TP1/C802.2 efficiencies but lower (or equal on some kVA levels) than DOE 2016 and NRCan 2019 efficieny levels. As a result NEMA Premium transformers were largely removed from the North American market in 2016 and replaced with units which met the DOE 2016 and NRCan 2019 efficiency levels.