Concentrating on the very wealthiest is perhaps unhelpful, as there are very few of them, so they’re kinda irrelevant for planning purposes. Most well-off people I know commute to work on the train or bus; the city center offices where well-off people tend to work in Dublin are not generally exactly well-provided with parking, if they have it at all, and the traffic is pretty horrible. The office of the tech multinational I work in has 700 people, and capacity for more, and, I think, about 30 parking spaces.

Being on the DART (a not-quite-metro; trains carrying a thousand people every ten minutes per direction) or Luas (a high-capacity tram system) lines tends to lead to homes being considerably more expensive than those which only have bus access.

Dublin used to have a synthetic ‘posh’ accent that was often referred to as DART-speak, because it was common in the upper-middle-class suburbs along the southern section of the DART line. Public transport can be posh, or at least seen as such.