Telco revenue streams drying up, Internet of things not the answer

In this article about market saturation, declining voice revenues, and negligible prospects for the telco industry, left unasked is where the money for IPv6 transition will come from? Are telcos intent on simply slowing their slide into irrelevance so as to maximize profits on the glide path? In this current milieu, are telcos going to undertake new investment with no tangible reward, or are they likely to leverage their dominance in IPv4 address space to slow the decline?  We know that many equipment replacement cycles have elapsed since IPv6 was finalized in 1998, but IPv6 penetration is still negligible. Are the telcos going to upgrade all their old DSLAMs and CPEs to handle IPv6 now, or continue to not fix what isn’t broken?