Should buttons’ position/placement be standardised across the whole platform?

I know that there have been threads about button placement, however what I'm asking is not a specific case. Rather, I would like to know regardless of contexts, should button placements be standardised across the whole platform?

For me, I think that it isn't as clear cut because both sides of the argument might have their valid points. For example, if the interaction was to open a new page/tab, the button (with a right-chevron signifier) be on the right. And when the context expands, the button (with a down-chevron signifier) will also still be on the right. This makes sense if we are trying to foster a sense of familiarity as we repeat our patterns. However, I also read this article and his point is that it depends on the users' reading pattern (which is based on the design).

Let me know what you think! :)