[azthecx]

I personally don't use it too, but I think it's origins are not just readability, but from developing queries in a REPL like environment.

As you develop and are constantly creating / debugging queries where you often add new and or or clauses as a whole line, that becomes much faster to add and remove those same lines as they're a single shortcut away in nearly all text editors.

[paperplatter]

Yeah, so often do I have an EXPLAIN ANALYZE query.txt file I'm repeatedly editing in one window and piping into psql in another to try and make something faster. So I put WHERE true at the top.