I fully accept that the Bible is the inerrant, infallible Word of God, and the fullness of revelation.
But having said that, I don't presume that God, having finished inspiring the various texts that make up the Bible, has run out of things to say to humanity.
And that's another problem I have with Sola Scriptura. I accept that the Bible is the foremost revelation God has given to humanity, but I find it hard to believe that it is the only source of revelation He has ever provided. Surely God has had at least one thing more to say in the 1900 (or thereabouts) years since John completed recollecting his vision in the text we now call Revelation?
Or is our God a silent one who has nothing more to say to us?