I generally use a soap, but I'm not sure why. I always have a tub of Castle Forbes Lavender in the den and it lathers quickly and does a great job, but I don't seem to use it often lately. And my soaps are mostly unscented, so that's not it.
I prefer soaps but Barbasol foam does speed up the process when I have to shave at 3 am. I still use my Semogue SOC Boar brush to apply it.With modern synthetic brushes, I can't really see how using a foam or gel is much quicker than using any soap or cream if you face lather tbh. Using Foam and Gel is messy and foam and a brush is not a good mix.
A puck of soap, or a dab of cream, synthetic brush and face lathering will give you the best shave you can. Foams and gels without a brush do not get worked properly into the stubble.
A brush does help to work the lather into the beard, and it lifts the hair up so that the razor will cut it easier. A brush also allows you to hydrate the foam easier. I have also been shaving since 1980 and I prefer making my shaving lather with soap and brush, but during the work week when I have to shave at 3am I use Barbasol and my Semogue SOC Boar Brush. Using the canned foam does speed up the process, it's just not the fun way to make lather. Atleast I get to use my Injector razor, and my brush.Who said anything about using a brush?
I use the foam the way it is supposed to be used.Simply rub throughly a SMALL amount in your beard by hand and of you go. Of course the foam gets worked properly into the stubble unless millions of men since the late forties that got wonderful shaves this way were simply lucky
The brush is an eighteenth century residue when access to hot water and bathing was problematic,you don't need it after a hot shower and face wash.
I have been shaving with a DE and canned foam since 1980 and only when I joined the...internets I "found out" that for some reasons unknown to men foam is no good
Even creams in tubes work better when applied brush less than when applied with a brush,"lather" is just air and it's importance over exaggerated, the only thing you need to shave is lubrication not air .