I just wrote, quite consciously, "There are expressions whose currency is due to no good reason . . ." Strictly correct would have been, "There are expressions the currency of which is due to no good reason . . . ."   Since 'whose' is the possessive form of the personal pronoun 'who,' it ought not  be used when the antecedent denotes an inaminate referent.  Or at least that is a rule purists will obey.  It is  a trade-off between strict correctness and stiltedness.

In the very next sentence I have "you can be sure" for the strictly correct "one can be sure."  It is a similar trade-off.  Do you want a tone that is formal or familiar?

The main thing, I suppose, is that a good writer writes consciously, aware of the rules, but breaking them when it serves his purpose. Split the infinite, begin with a conjunction, end with a preposition  if  it gives your sentence the flow and feel you desire.