[SoftTalker]

I was taught in high school that using "In conclusion" to open your conclusion was cliche and really almost like an unnecessary slap in the face to the reader. Your composition should end with a conclusion, yes. There was a standard formula for that, yes. But it's not necessary to literally label it as such.

[lupire]

Many of the disliked essay writing cliches are good speech tropes. The difference between reading and listening is that in reading you can skim and skip and rewind, so you don't need structured signposts to guide you through the content. In listening you do. You can't see the last paragraph coming when listening to a speech.

An entertaining informative style of speech can detract from clearly communicating substance. (Of course, the audience rarely wants substance.)