I find that "saved" is a tricky word. People can hide behind that word, as if simply by saying yes to an altar call and "accepting Jesus as their personal Lord and savior" creates some magical change in a ledger line entry in heaven, and that's it, "I'm saved now!", and then they go about hating others who are "God's enemies" by joining right-wing political rallies, as such. That's joining a religion. Not salvation.
I see "salvation", as much more akin to, if not identical with, Enlightenment, which is a freedom from illusions of "sin", in so many words. It is a process of transformation to complete liberation. "Where the Spirit of the Lord is, there is liberty". Suffering ceases. Fear ceases. Love becomes abundant and overflowing. Darkness is dispelled. And indeed, few there are who find it.
I think what I hear is along the lines of the sower and the seeds. Many seeds are sown, some quickly sprout up as they "see the light", so to speak and "accept Jesus", in whatever form that takes. But few find proper ground and actually grow and mature. The rest either wither and die, or are swept up by predators into believing being saved means being on "God's team", as some form of self-deception that they are being true to their original spiritual calling.
Does that number grow? According to that parable, while there may be millions of converts, most won't survive, as it takes genuine cultivation and commitment to both grow and tend a garden. It's much easier to just simply take a shortcut to Nirvana, call yourself saved because you said "yes!" to Jesus, and go on your new glossy form of serving your own human ego.
I will say this however, that if there are more genuinely authentic spiritually awakened souls out there, that can have an effect on others who are seeking light. So in that sense, that "few", becomes a few more.
I agree. When someone sees that they are still harboring resentments towards others, this becomes an indication of something more yet to be let go off. Letting go, is a process. More an more you become transformed, "from glory to glory" as Paul put it. And the result of that is what I'd call "salvation".