In last week’s column, I outlined reasons to be cheerful about Ireland’s housing system – and a key area of concern. The reasons for optimism included Ireland’s macro-prudential rules (currently being reviewed in full) as well as the arrival of cost-rental as a key means of delivering social housing and the apparently imminent use of an upzoning tax as a form of ‘value capture’. They also included a substantial pipeline of new rental accommodation coming in the early 2020s, at least in Dublin. That supply will make rental accommodation in Dublin more affordable than if those units were not built…