No, you communicated before with somebody else.

> still leaves up to 5GB of redundant garbage

No, if you read that example, there is less than 1 GB which is stale (the diff between the first and the third number):

>> Windows Explorer Reported Size of Component Store : 4.98 GB

>> Actual Size of Component Store : 4.88 GB

>> Shared with Windows : 4.38 GB

As I've said, you intentionally didn't quote your machine's third line but I'm sure it's not a 5 GB difference.

Moreover, that difference can be purged if necessary. Which you can also do on your machine with just a single command, per link on the same page:

https://technet.microsoft.com/en-us/library/dn251565.aspx

There is a trade-off, the probable case why nobody does it unless really necessary:

"All existing service packs and updates cannot be uninstalled after this command is completed"