Is it possible to base a custom GTK+ theme on Adwaita without having to compile a custom GTK+?

I planned on following https://worldofgnome.org/creating-g... to solve a scrollbar styling issue for myself.
But that guide seems to be horribly outdated as Adwaita seems to be fully compiled in as an engine now - for performance reasons, wich they obviously would never expect to matter to people using custom themes (because else they would have optimized the application of all themes in general instead)...

Mozilla really knows how to nudge one to not use email encryption by default.
Since Thunderbird has native support for OpenPGP encryption, i can only chose to encrypt all or no messages by default. There is no opportunistic mode and there are no per-reciepient encryption preferences. The Enigmail addon had both.
So i obviously have gone for encrypt-by-default.

But since then, whenever i want to send a message to the majority of my contacts, i have to manually disable the encryption or get annoyed by the no-key-found dialog.
I thought, i would get the muscle memory to just disable encryption for recipients for wich i don't expect to have a key.
But they also made the GUI so i have to open a dropdown and then click on the right item to do that. All the items basically look the same, as there is no color coding or specific icon for them. The item labels are also too long for unconscious pattern recognition.
So i didn't got that muscle memory.

I now have turned off encryption by default and will probably forget to enable it for some emails wich i actually could send encrypted...

Freecad isn't open source software!

If it is impossible to get something compiled, it can't be open source.
When you can't compile it, all, that is left, is to use a binary.
If there is only a binary, it isn't open source.

Seriously: If you are participating in an open source project, please make sure, that compiling from source is a viable option for the generic gentoo user. Thank you.

Why are ranters in general only inserting an image instead of quoting or linking the object of the rant?

When imposter syndrome hits me, i just scroll through the latest CVEs. That reminds me, that even the best can't do it properly.
I also am old enough to have seen the latest shit emerge and disappear multiple times. So there is no pressure to keep up with latest crap of the week.
Also, our industry is full of sloppy corner cutters. So that i am not sloppy and don't like to cut corners, already makes me a rare kind of coder.

Know your strengths!

I am here for some days now and still only see downvote buttons everywhere. There are no upvote buttons.
Is that a bug or when does the upvote buttons become available?