It's just useless for me now, the change happened some 5 or so years ago.

"Hey Siri, play [song]"

Leads to, take your pick:

- "You'll need to unlock your iPhone first."

- "I couldn't find [song] on Podcasts" (??????)

- "Playing [a totally different song]"

- "I couldn't find any music by [song, but it thinks it's a band]"

- "Playing music by [song, again it thinks it's a band]"