Having worked for a fair few banks over the years, I can confirm this. There's a whole bunch of banks still working with systems that haven't seen an upgrade since the early-to-mid 90s, some even earlier than that. And this isn't fly-by-night operations, we're talking multinationals. Same goes for energy companies and the like, they're all operating on systems at least 25+ years old. They do try and update or upgrade them, but that basically requires building the entire thing from scratch and can take literally years. By the time even the simplest replacement is done - and I mean even adding stuff you take for granted, like mouse support - the upgrades are out of date and need to be overhauled all over again. At the end of the day, yeah, the old systems are slow, hideously clunky, user unfriendly and make your eyes bleed if you look at them for more than 20 minutes a day, but they work and handle 90% of all customer requirements on a day-to-day basis, so they hang around like a suicide in a crawlspace. And, like Oni's coding, it's starting to smell, but not enough for him to do anything serious about it.