Flash, Java, and IoT
In my workplace, which is so far from the cutting edge of technology that we can't even see the handle, we have a device which requires Flash for remote access... and of course, the people selecting this device claim to NEED remote access.
We also have a device which uses Java... but not any of the new versions, this requires Java from, as I recall, six or seven years ago. Thank goodness for archives of old versions of Firefox (and Portable Apps, so it doesn't interfere with newer versions)! This device does not have a physical control panel, and as far as we can tell there will be no updates to the firmware ("Buy our newer hardware, which is more expensive and not suited to your needs").