Someone really well versed will have an understanding of how old English sounds for layperson. Also, we are discussing a situation when everyone is more or less

Someone really well versed will have an understanding of how old English sounds for layperson. Also, we are discussing a situation when everyone is more or less fluent in a given [programming] language, and the probable culprit is just flexing their recently gained obscure expressions or constructing overcomplex one-liners.