Although on the surface it appears that this is a major change, brought about by COVID-19 and remote working, it is however not the full story. Google already owns several buildings in Dublin, it is in the process of refurbishing one and constructing an 8 building campus. The building that they have turned down was only ever supposed to be a stop-gap measure while awaiting the completion of the other work.

https://www.rte.ie/news/business/2020/0912/1164713-work-from...