Speaking for myself, no. It's another of those non-rules that prescriptive grammarians like to try to foist on the unsuspecting. English has so many phrasal verbs that are formed with a preposition that it's nigh on impossible to avoid.
"No man but a blockhead ever wrote except for money." Samuel Johnson.
Not awkward, I would say, but formal and perhaps a bit stiff. I still avoid sentence-ending prepositions unless I have specific reason not to want to be seen as formal or stiff.
But then I'm probably more dinosaur than many. Comes from an overblown sense that there really is a right and a wrong.