display multiple tags together as separate lines in the "user stats" graph

[KenjiUmino]

I just ordered two mecanical keyboards where I can swap out the preinstalled switches for different ones and I got a few bags of switches that I salvaged from dead keyboards - I want to test different configurations and get some numbers to find out what actually works best for me.

I know I could use "tags" to display the tests for each keyboard separately, but AFAIK, there is no way to display multiple tags in parallel for comparison - they only display in series in the order the tests were taken.

To illustrate what I mean, I created a tag for myself and did a few tests using this tag, then let my girlfriend do some tests under a different tag.

Being a "hunt & peck" typer, she's way slower at typing than I am as you can see in the graph going downhill.
That's both graphs in series:

Now, I'd like to be able to view those two tags separated but together in the same graph like this:

This makes it easier to see the the difference at a glance - for me at least.

I can see this being useful for anyone who wants to compare how they perform across two or more different typing situations - different keyboards, physical layouts (staggered vs. ortholinear vs. ergonomic columnar) or logical layouts (dvorak/colemak vs qwerty/qwertz)

What do You think ?