When comparing OneStepBack vs Materia, the Slant community recommends Materia for most people. In the question“What are the best gtk3 themes?” Materia is ranked 6th while OneStepBack is ranked 7th. The most important reason people chose Materia is:
Includes support for Gnome Shell, has a Cinnamon desktop theme, plus supports XFCE, Mate and all the usual suspects.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Easy on the eyes
The color combination has been carefully engineered exactly for the purpose of making people comfortable, while staring at the monitor for a prolonged period of time.
Pro Allows you to focus on what's needed
The design is extremely basic - using just 1 color accompanied by 3 shades of grey, OneStepBack manages to be a very functional theme without adding any flashy.
Pro Good support for various DEs
Includes support for Gnome Shell, has a Cinnamon desktop theme, plus supports XFCE, Mate and all the usual suspects.
Pro Under continuous active development
Responsive and helpful developer.
Pro Customizable via Oomox app
Users can build completely personal version easily using Oomox Gui app.
Pro Corresponding theme for Qt/KDE
There is a corresponding theme for the kvantum-engine under Qt/KDE.
Cons
Con Looks old and dated
it's not flat
Con Funky arrow button colors in FireFox
The developer is currently aware of this issue, however the fix can't be made until FireFox has an update.
Con No Round Corners
Let's be honest Round Corners is a must addition in 2022.