Also, whilst you may use all-lowercase user attribute names, I’d advise sticking with Tinderbox standard for system attributes. Alongside this thread we see another where this confusion over the case of attribute names tripped up some code.
See more on Attribute Naming. Enlightened self-interest suggests have a set of naming ‘rules’ (a simple convention) to follow makes us less prones to unintentional typos derailing our code.
Now, for those who program all day and a coding language that has existing different conventions for naming variables, etc. then trying to switch between conventions may argue for sticking with a different naming strategy. However, I’d wager the letter group is a small subsection of the general Tinderbox user base.