Interesting read however even that was 4 years ago. A lot of European banks have been making major upgrades to their IT infrastructure (for better or worse) in

Interesting read however even that was 4 years ago. A lot of European banks have been making major upgrades to their IT infrastructure (for better or worse) in recent years so it wouldn't surprise me if a few of those EBCDIC systems have been torn out of American banks as well. However even assuming they are still in use (which is a real possibility knowing how slowly banks upgrade) I would be surprised if they depended on GNU Awk let alone undefined behaviour in its Regex library. I'm not normally someone who says "move fast and break things" but I do think this is one situation where it is ok. I mean EBCDIC is hardly recent and it wasn't exactly popular even when it was "current tech" (I seem to recall it was a bit of a laughing stock?)