One problem with pivot and its reverse operation is the poor terminology surrounding them. In addition to pivot itself, people used unstack, stack, gather, melt

One problem with pivot and its reverse operation is the poor terminology surrounding them. In addition to pivot itself, people used unstack, stack, gather, melt, reshape, transpose, … A single reversible concept like pivot_wider and pivot_longer from tidyverse, really helps clarity and I wish other libraries also start using this better terminology.