I realize that this research is still in it's infancy and the development of sophisticated instruments needs to continue.

But claiming 'stability' seems rather dubious. A few million or even few tens of millions of years of planetoid survival is rather ephemeral in the greater scheme of things.

Questions that need to be answered are: How old are these stars? How stable are their binary orbits?

How well developed are their proto-planetary disks?
Would not the aggregate disks be disrupted before planetary formation is possible?

After a few tens of millions of years, what happens next?
In the article it was implied that these planets could eventually be ejected from these multiple star systems.
Is this a predictable event? That we should be watching for?