The Bible does not leave the timing of the "last days" vague or open-ended. Jesus and His apostles consistently spoke of the end of an age that they themselves were living in. This is not speculation or system-building. It is the plain reading of the text. There is not a single verse that suggests the biblical authors believed the "last days" would occur thousands of years after their time. Not one. If that unsettles you, that is not a failure of Scripture. It is a challenge to your tradition. https://robbiecarrier.com/writing/the-end-has-already-come