It doesn't surprise me that things about this "have been quiet." That article doesn't state when the compromise occurred, and across how many hours or days, but it can often take weeks to months of forensic analysis to determine what, exactly, was compromised.
I've been part of two large data breaches here in the USA in the past, one with Anthem (one of our major health insurance companies) back in 2015 and another in 2017, with Equifax, one of the three "big players" in the credit reporting industry (and where the unauthorized access lasted several months).
It takes a while to figure out what is in hands that shouldn't have it, and at least on this side of the big pond, when this sort of thing happens the company where it happened typically offers between one and five years of identity protection monitoring. Nothing appears to have come to anything with my personal data, as the shelf life for this sort of thing is finite (even if the data itself isn't) and I had no adverse events afterward. But I did put freezes on all of my credit accounts at each of the three big credit reporting agencies, and one smaller one, to prevent anyone from even attempting to open any new lines of credit in my name.