Look Kersten, in the context of this discusssion, a slur over notes in string writing is more often than not indicitave of bow changes. Of course I know about longer phrase slurs and other uses, did you really have to clarify that for me, thinking I didn't know? But, given the discussion, my post above was chiming with your pov to a certain extent anyhow, suggesting you are right in some cases, not that you'd see that.
Oh and by the way, it is always a matter of knowing how to write well for strings and that includes bowing technique if you want to write to a high standard. In all my pro sessions I have only ever had one discussion about alternative bows, so I do know something about it.
How do you expect a composer to exploit in a creative, compositional emotional manner, bowing techniques that inform and enhance his/her work if they do not t know about them?...well?