It is my understanding that JS had that table especially set up for high runs.
The table was selected and brought in because it played super soft -- the pockets were extra big, the rails especially forgiving, it was set up with not normal cloth, heaters under the table, and the a/c in the room set super high.
Those specific six factors/abnormally-easy conditions cited frequently (and possibly quite correctly) on AZB, could logically be set up and duplicated anywhere in the world, and were there some substantial monetary (and psychic) reward there'd likely -- worldwide -- be about 6 or 7 players with sufficient 14.1 skills who'd be a not-unreasonable bet to surpass John's number -- if, and only if,
they also possessed John's demonstrable stamina, remarkable resilience, and obsessive (in a good sense) determination. So much about world-class playing is indeed about obsession, as with any athletic performances and sports records.
We'll never know in the short term, because no one anywhere that I know of, is currently reported as setting up the same (rumored) playing conditions cited as being used by John and his team.