Yes, I think between the time the Lord said, Twelve Thrones for the Twelve:
"Jesus said to them, “I assure you: In the Messianic Age, when the Son of Man sits on His glorious throne, you who have followed Me will also sit on 12 thrones, judging the 12 tribes of Israel." (Mat 19:28) and the time, probably 1 or 2 years later, that, as it is written, Satan entered Judas, somewhere in between, Judas lost his Salvation. Imo, the example of Judas shows the promises of God are conditional on perseverance. The Eleven Apostles, by the Grace and Mercy of God, persevered in Faith until the end and obtained the Promise. Judas failed to persevere and thus did not obtain it, though the Lord promised it. Matthias or Paul got it instead.
If you mean justified, yes. So, let's come to the point, what is necessary and sufficient to be justified?
(1) Confessing Jesus is Lord:
"no one can say, “Jesus is Lord,” except by the Holy Spirit." (1 Cor 12:3)
(2) Confessing Jesus is Son of God:
"Whoever confesses that Jesus is the Son of God, God abides in him, and he in God." (1 Jn 4:15)
Likewise, similar passages show (1) Believing in Christ as Lord and Savior (2) confessing/repenting of one's sin is both necessary and sufficient for forgiveness/justification. Without any doubt, believe in OSAS is not necessary for salvation.
Since many non-OSAS Christians confess (1)-(2), it follows that Non-OSAS Christians are Justified. If OSAS were objectively true, NON-OSASers would also be OSAS just by this confession. But since it is not, perseverance in confession is needed.
Let's look at the passages:
1 Cor 3:13-15: "13his workmanship will be evident, because the Day will bring it to light. It will be revealed with fire, and the fire will prove the quality of each man’s work. 14If what he has built survives, he will receive a reward. 15If it is burned up, he will suffer loss. He himself will be saved, but only as if through the flames."
The passage describes two kinds of Christians (1) the first group is completely sanctified and faithfully labors out of love for the Lord, as he had said he and Apollos did in vs 8. These Christians receive a Reward from the Lord. (2) the second group, after justification, neglects sanctification. They suffer loss, lose rewards, face chastisement/discipline from the Lord, and are "saved but only as if through the flames". Now, why would anyone choose the 2nd path rather than the first?
Any thoughts on that? True that we can neglect sanctification a little and still be saved, yet it is unwise imo to do that.
Again in 1 Pet 2:5-11, quoted earlier, it describes two possible paths Christians can take, and one has far greater rewards.
God Bless.