Geothermal isn't really geothermal in the traditional sense. What they are doing is using heat pumps except putting the outdoor side (hot side in summer, cold side in winter) with a underground coolant circuit to be a little more moderate over the year, say the ground source is 10 - 15 *C year-round instead of say -10*. It is a bit more economical than a traditional air-source heat pump since the delta T is lower but you have so much added complexity and capital cost that it doesn't seem to make sense in most cases. People talk of a payback period but they always compare to baseboards that consume much more energy than heat pumps do. It isn't like Iceland where they can easily access a ground source at 80-90 *C so they just pipe the water through radiators. In terms of condos it is surely a cost issue. Baseboards mean zero expense on condo fees and low capital expense. To use geothermal probably they are running one giant heatpump on the roof and that has big capital expense and then recurrent condo fees. But also - how would you adjust temperature in the individual units?
So live this day that you can look every damn man straight in the eye and tell him to go to hell.