Hi Mat,
I used to take my notes in Notepad++ extensively and this is a screenshot of the UI configurator in np++.
Notice how thorough it is yet how clearly everything is labelled making it so much easier to follow. In Tiddly everything is named in a more technical fashion and i cannot figure out what does what. e.g. what even is General Primary ? Where is the Text foreground option? How do i change the background and text color of the sidebar? What are the options to change tab outlines? Everything just seems excessively complicated. Plus you get to view the changes in real time in Np++. In Tiddly if i change a random setting i have no idea what got changed.
Not to mention there's even more options to configure text colors in Np++ if you learn how to define a language. I have also attached an image of one of my notes where i use my custom defined language alongside a customized theme. Hope this helps to lead us to a more user friendly tiddly.