All the excitement surrounding the power to quickly and easily alter one's appearance has largely died down. Social norms have arisen around what kinds of changes are acceptable and which kinds are not.It's a few years later in the universe of this question and this question. The rules from the previous two questions still hold with a few additional more:
- Speciation is not permitted. Even though a person's appearance may become distinctly unhuman, they are still completely human from a procreation perspective.
- Altering brain structure or chemistry is still strictly prohibited. However, all the genomic research that's been done has provided phenomenal insights into mental illness and drastically improved treatments have made it through clinical trials and are now available. Improvements in medical insurance (for those countries not on a "single-payer" system) now include mental health coverage for all plans. The stigma surrounding mental illness has largely evaporated. "Getting help" is encouraged and supported broadly in the general populace.
- Alteration of gametes is also strictly prohibited.
- Only a very limited set of alteration treatments are available to anyone under the age of 18 given children and teenager's developing brains and senses of identity. Alterations for someone underaged must be approved by the regulatory body.
Clarified Question: On the one hand, humans love variety, new clothes, new haircuts, new music, new everything. On the other, rapid and large changes in appearance, such as changing overall facial shape or brow lines, might disrupt society by making it difficult to identify friends/enemies or disrupting a person's sense of self. Beyond these two examples, what would slow down or stop a person from making frequent large, radical changes to their appearance? (I realize that there will be substantial physical constraints to large changes, but I'm not worried about those just yet.)