Toys which are propping up most of civilization then :) What is holding back more efficient serializable transactions becoming more mainstream? Is it: A lag

Toys which are propping up most of civilization then :) What is holding back more efficient serializable transactions becoming more mainstream? Is it: A lag between academia and industry? Entrenched software which makes it hard to implement / update to modern technology Performance issues which make the benefits for safer transactions not worth the computation tradeoff