Today I was directed to the following video, in which Doug Wilson answers the question "Will Faithful Roman Catholics go to heaven?"
First of all, for a more in-depth discussion on Roman Catholics and their status, I would suggest people consider the debate between James White and Doug Wilson on "Are Roman Catholics our Brothers in Christ."
Second, I would agree that anyone who is truly repentant for their sins and trusting in Christ alone for salvation will be saved. Communion with Rome is not an unforgivable sin. Nevertheless, one of the fruits of the Spirit is sanctification. One would expect that as a believer undergoes sanctification, they will come to find the idolatry in Rome's liturgy to be the abomination that it is. They will be able to stomach it no longer. That's an expectation, but it is not a strict rule.
Third, the fact that one can be saved in an apostate church is not a good reason to stay in an apostate church, just as the fact that one can be saved even while fornicating is not a good reason to continue fornicating. I'm not saying the two sins are identical, though the Scriptures themselves draw a parallel between idolatry and fornication.
Finally, if you are a Roman Catholic reading this, please know that my primary concern is the state of your soul. I want you to be right with Christ. I'm not pushing some particular denomination or congregation. I'm pushing faith in Christ alone for salvation. Please consider it.