Why is using the particle 'wo' now seemingly optional? Why is using wo, now seemingly optional? Now I tend to only see noun suru opposed to noun wo suru/shimasu. What are the implications/ connotations of using or not using wo? Are there times where you have to use it or is it now down to formality? (sorry my Japanese keyboard isn't working)

The particle is often left out of casual conversations, in fact casual conversations in general enjoy the luxury of not having to use as many particles as polite/formal speech.

> Example:

Even in polite/formal speech its common to see