Use of Brief Forms, Shortcuts, Special Forms: which, when, and where?

The point has been brought that no shortcuts should be learned until the standard brief forms have been studied, and the standard theory learned. I would like to read some opinions about this. That has been the standard recommendation when Gregg shorthand was taught in schools and was geared mostly to the business world. But has this situation changed now? Writers should take down easily and comfortably any kind of material, regardless of whether it is business-related or not. So this got me thinking: what is the potential danger of learning to write common words (not necessarily specialized words, or not those written as brief forms or special forms) as shortcuts from the get go vs the "standard way". There are still a great number of high frequency words that can certainly be written in shortcuts. For example, why not learn to write "accumulate" as "a - k - disjoined u" vs the standard "a - k - e - u - m - disjoined u"? What are some advantages and disadvantages?

(by Carlos for everyone)