Someone was saying that even if using machines becomes cheaper than using humans, capitalist will still use humans because
"automation constitutes constant capital and human labour is variable capital
The Tendency for the Rate of Profit to Fall disproves that fact"
What do those mean?
https://cosmonautmag.com/2021/10/why-machines-dont-create-value/
For anyone who hasn't read this article, I think it brings together most of the important points to consider when discussing automation from a Marxist perspective.