"Mainstream thinking" refers to commonly accepted or popular ideas, beliefs, or opinions that are widely held by the majority of people in a society or a particular group. Full definition
«Positive health,» an area that has grown out of positive psychology was ignored for years but is now part of mainstream thinking in the field. (mentorcoach.com)
I suspect that this description perfectly mirrors the current mainstream thinking surrounding parenting and discipline. (teach-through-love.com)
So a 50/50 equity / bond split would be well within much mainstream thinking, at 60. (monevator.com)