CPE Bach and fingering

[rc]

In his book CPE Bach recommends practicing scales in different fingerings.  The idea is to develop versatility and have fingering become second-nature on the fly.  Always practicing the same fingering is efficient, but possibly inflexible.  Aside from his 3,4,3,4,3,4 that feels uncomfortable, has anyone tried practicing different fingerings and is it worthwhile?

Please no Bernhard links, his posts are great but I've already read what he thinks back when it was fresh.