So soon as a fashion is universal, it is out of date.

[Sobald eine Mode allgemein geworden ist, hat sie sich überlebt.]

Marie von Ebner-Eschenbach (1830-1916) Austrian writer

Aphorisms [Aphorismen], No. 280 (1880) [tr. Wister (1883)]
    (Source)

(Source (German)). Alternate translation:

As soon as fashion has caught on, it has outlived itself.
[tr. Scrase/Mieder (1994)]