I say this without any personal experience in the FKT realm, but I think someone will probably best Andrew's FKT this year. I think Allen and Ralph took great shots at it, and I think both are capable of doing it.
I don't mean to diminish Andrew's accomplishment in any way, either. All of these sub-four-day JMTs are heroic, in my mind.
The supported and unsupported times are only 3:30 apart. I think whoever sets the new unsupported record might beat Leor's time, too.
I think Andrew could come back and beat his old time, if he wanted too.
In short, I think there's room to improve the unsupported time. The supported time has room too, but the logistics and support necessary to do one means they're undertaken with less frequency. Ergo, fewer opportunities for them to be bested.
My crystal ball says someone beats the unsupported AND supported time. Then, Leor comes back with another effort (perhaps unsupported) and really sets the bar high. Crushes it. Sub 72? Maybe. That record will stick for years.
That's my reading of the tea leaves, but I'm far from an expert–an armchair fastpacker, really.
Yeah, Leor crushed it from Donohue to Happy Isles. He also flew up and down Whitney.