said by DSA :Longterm, the plan is to go fiber for legacy buildings like yours, and convert in the basement to POTS/VDSL, but that is still a few years away.
It's already happening in many buildings, but mainly as a way to offload ports from FTTN sites (we want all FTTN sites limited to 2 DSLAM's max, for reasons you'll soon learn).
@ wildmanbob, typically in these buildings a DC power plant is built, which sources power from the in-building AC power. Span/remote powering is actually not the preferred option in MDU's due to safety reasons (consider what happens if a lightning strike somehow hits near a power pair, we could blow the DC inverters and cause a fire in the MDU equipment room).