Well,
relative to my first Marcel Grossmann Meeting [1] (MGM5 in Perth, 1988, along with JG [2]) it's a new paper.
In any case, the paper doesn't claim that black holes can't form.
It claims that under conditions X, Y, and Z they don't form.
And, as usual, there's been a slew of robust responses.
[1] http://www.icra.it/MG/
[2] https://www.imperial.ac.uk/people/j.gauntlett