One outstanding thing is this parable of the vineyard, is that Jesus does not speak this parable to promote the idea that it is OK to wait until the end of life to repent. It has nothing to do with repentance on the deathbed. Of course, Jesus promises salvation to everyone, including those who obey the gospel in the last days or the last moments of his life. God knows the heart. But remember that those who went to work until the sixth, ninth or even the eleventh hour entered the vineyard when they could. They were in the right place waiting for the opportunity to work, and they took the first opportunity.