I saw some Internet-based information systems on Czech railways down today. An information kiosk was showing Firefox's "Address not found" error page, one train had no onboard Wi-Fi and no tickets were getting checked. A store I went to did not accept cards today, either. Trains were unusually delayed too, I heard at least 3 different vague reasons over the PAS (technical problems with train, diversion, unforeseen circumstances).
However, except for that train I was able to connect to various known networks and they all worked.
I can't imagine how this incident you noticed is connected to the root server issue.
As long as there are no relevant changes in the root zone (and according to the article, there were none) this root server issue was likely without impact.