IMHO, the original spec had it right when it said (paraphrased) “just upload your tw.txt file wherever”. The essence of micro-blogging, as opposed to full-scale blogging, is low friction and low stakes. Imposing a norm that you can’t just use any ol’ url, looking down on people with insufficently cool urls (as in “Cool URIs don’t change” https://www.w3.org/Provider/Style/URI), puts up too much of a barrier to entry.

You know how maps typically include a compass rose to help readers figure out where things are located in relation to each other? I want the anatomical equivalent of a compass rose for the linked drawing, because just by looking at it I can’t decipher which anatomical axis (anterior-posterior vs superior-inferior) corresponds to the up-down axis of the drawing. https://en.wikipedia.org/wiki/Uterus#/media/File:Uterus_image-Photoroom.png