Do all good craft breweries use oxygen to oxygenate their worts for fermentation?

[MaryB]

I drain into the fermenter from 4 inches above the top rim. I let it splash and foam and that is plenty of aeration for me.

 

[Finlandbrews]

I just called the company in Finland (woikoski) who sells tanks and gazes and the guy told me he has been working for four years and he has been requested to provide oxygen tanks to three micro breweries in the last year only, nothing the three previous years he worked there! Interesting...