What is Fragilaria koensabbei and does it matter what it is called? (Meta)barcoding and the science of taxonomy

Commentary is provided on the use of barcoding and metabarcoding in diatom studies and its broader relevance to the principles of taxonomy. The claims that taxonomy, however it is performed, is time-consuming and that it requires extensive expertise, due to a constantly evolving taxonomy, are questioned as good, even useful, criteria by which to judge a science.