Nope, I absolutely hate Jira and everything that I needed to do in it at my old job. Luckily for most stuff we had other issue trackers (multiple, but that’s another issue), but whenever I had to touch Jira or any other Atlassian tool, it was a bad time.
The only use that I’ve thought of over the years is event logging where you need a very high confidence that no one has tampered with the logs.
For consumer software, yes, most is still being built with a baseline target instruction set from the early/mid-2000s. In 2019 there were reports of Apex Legends requiring SSE4.1, an instruction set from circa 2007. It will be be probably close to a couple decades before consumer software would start commonly requiring these instructions.
However, for more specialized environments, such as scientific and high-performance computing applications, it’s much more common that you will be using custom software designed for a specific task, and that it’s normal to recompile the software when you get a new set of hardware. In those applications, these instructions can make a huge impact, as you know exactly which capabilities are supported by the hardware and can use everything available.
I believe there are also some (possibly limited) situations where a program can check what instructions a processor supports and use either the newer (higher-performance) version or the slower, more widely-supported version depending on that check. There may be limits on how often that can be done however.
2005 and 2009 for the clear detail, and 2017 for the simplification that still clearly conveys the logo.
Videos are not documentation.
They can be used to demonstrate examples of how to do a particular task, but as other commenters have mentioned, documentation involves listing classes, functions, parameters, etc and clearly explaining what they all do, in a searchable manner. Text is searchable, video is not.