Based on my familiarity with the catalogs of the more recent text-critical EBT genre authors, I estimate that the Dhamma will remain as an institutional religion with any real presence for a few more generations, at best (this is in contrast to the Dhamma having been preserved thus far since the Buddha began teaching it over 2,500 years ago — and remember that the school that maintained the Abhidhamma and Commentaries, the Theravāda, is the only complete school that has survived until modern times). The Dhamma simply will not survive contact with Western civilization. It is pretty simple as the influence of these ideas will quickly become ubiquitous. I spoke about this a little bit here. Paradoxically, if Western civilization collapses, the Dhamma has a much greater chance of survival.
Renaldo