https://palant.info/2023/01/02/south-koreas-online-security-... HN discussion: https://news.ycombinator.com/item?id=34231364
https://www.forbes.com/sites/elaineramirez/2016/11/30/south-...
This is not unheard-of in the enterprise world in the US either. To name-and-shame, Allscripts Enterprise EHR system still uses active-x controls and is still actively deployed in hospital systems.
The typical deployment will be a sandboxed VDI installation that isn't allowed to directly talk to anything except its EHR server and has to be connected via citrix or similar. It is still insane, of course, but the medical world is another one that moves slow. Probably some stuff in the financial sector too, they like that shit too.