Change 248814 had a related patch set uploaded (by Niharika29):
Add a column to indicate the default on/off status on Special:GadgetUsage

https://gerrit.wikimedia.org/r/248814

@NiharikaKohli: Hmm, it looks showing usage stats for default gadgets is going to be confusing even if we indicate that they are default. For now, let's do the following:

• Remove default gadgets from the table output
• Add a sentence to the page description that says that default gadgets are not included

I'll create a new card for having a separate table on the special page which shows stats for how many people have disabled default gadgets (which will be much more useful than showing just 0).

Change 248814 abandoned by Niharika29:
Add a column to indicate the default on/off status on Special:GadgetUsage

Reason:
Default gadgets will always show a 0 for number of people who have enabled it. This is confusing. We should add a separate table for the default gadgets. Coming up in another patch.

https://gerrit.wikimedia.org/r/248814

In T116393#1755019, @kaldari wrote:

I'll create a new card for having a separate table on the special page which shows stats for how many people have disabled default gadgets (which will be much more useful than showing just 0).

@kaldari: did you create the task? Where is it?

@He7d3r: Oops, forgot to update that. I discussed this with Niharika on IRC and we decided not to work on that for now. The reason is that it would require significant refactoring of the SpecialGadgetUsage class and wouldn't have a huge impact. In particular, we would have to migrate SpecialGadgetUsage from being a QueryPage to something more complicated and would have to write our own caching system for it rather than using the built-in caching provided by QueryPage (which only works for very simple queries). Instead we just removed default gadgets from Special:GadgetUsage entirely and added a note about that to the page description.

The suggestion at T121133 seems reasonable though.