That setting has been there for a long time and it is still there, it's on by default. I personally leave it on on my phone just cuz I'm aware of it and I do like the ability to interrupt it without having to tap on anything, especially as it starts trying to read email notifications and will ramble on forever if you let it but it definitely should be a little more obvious that that is a setting, it should not be buried halfway down the talkback setting screen.