The tag software here on this site doesn't seem to serve much purpose in categorization.
The excerpt for the tag states the following:
Use this tag for questions about the software that powers the Stack Overflow, Stack Exchange etc.
Given that we have a close reason for questions that "[do] not appear to be about the software that powers the Stack Exchange network", this tag would therefore cover every open question on the site.
The extended tag description provides some specificity:
This tag is added to questions about the software that is used to make the Stack Exchange network tick.
...meaning it's for questions that are asking about the system's internals. However, we already have another tag for this purpose, technology.
Looking at the actual questions using the tag, only one is about the topic outlined above, and is already also tagged technology. The vast majority are using the tag in reference to some other non-SE software, pretty much all of which have other, more useful tags. There are only three that lack another non-required tag, of which two could use the site-recommendation tag, and the last remaining one is out of scope for this site today.
Should we uninstall the software tag?