Having said that, I'm working on an alternative GPU accelerated and retained-mode GUI called eepp (https://github.com/SpartanJ/eepp/) while I work on a new code editor similar to Zed called ecode (https://github.com/SpartanJ/ecode). The framework still needs a lot of work but presents some ideas that might be interesting to some. Retained-mode GUIs are a complex beast and it's hard to achieve simplicity (I think immediate-mode GUIs can't be beaten in that regard, but they have their own downsides). So I invite anyone interested in GPU accelerated GUIs to take a look at my projects (online demos are available), I'm looking for collaborators! (sadly C++ isn't very appealing these days, but my code-base is huge and I can't write everything from scratch in a new fancy and cool language).