>> Yes, that would work!
There are several reasons why it's not a good idea.
My fingers are sore from all the typing, so I'll try to keep it short.
Things are changing.
Google's new design (not just the visuals, the interaction patterns are changing).
The way Google imposes it on everyone in 5.0 by turning off features in the Material theme, and by changing approach to layout (more empty space, fewer things that can fit same area).
But really, just accept that it's not 2011 anymore, and things look and work different from before.
Don't ask me to create something monstrous, arbitrarily mixing visual and interaction patterns that are separated by several years.
For those who prefer things as they were, just don't use the new "Juicy colors" theme. The old ones, "light" or "dark" are still there and will continue to be.
Yes, it's a compromise - so I'm forcing you to choose.
If I worked at Google, I'd take that away being able to choose.
But I don't and never will, so I'm providing multiple options for you to choose from. Please don't lose sight of that.
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PS - I'm not entirely happy with this new Material Design thing, neither on the web, nor on Android. I find some things are annoying, some are broken, and some are downright unusable.
But I'm going on focus on moving forward.