While I have been the one posting about clang indexing working with SlickEdit, I do have to admit that I have no compelling reason to use it. The SlickEdit tagging is accurate enough for me. The occasional errors I see are usually fixed by Dennis relatively quickly (except if no point release for a few months and a hotfix can't fix the bug, which just happened with the :: parsing error - but that issue only occurred for a small part of our code base). I really like the speed, and as Dennis writes it is quite forgiving with incomplete code, which I benefit from all the time! And setting up my project is very easy - no need to worry about include paths, etc. Additionally I don't often need to browse complicated templates that often, which a clang parser may help with, and SlickEdit already handles these quite well. As it seems like it could be a large effort for SlickTeam to implement/support this, delaying it, doing with caution or punting it seems very wise so that more useful features could be implemented.
My point on this thread was mainly to show the types of discussions I've had internally in my company and also on reddit - to bring this to SlickTeam's attention - especially that claim about QtCreator/clang being so fast, as well as bringing up how a compilation database JSON file could be useful in SlickEdit for building a single source file. In my internal company discussions, I repeatedly make the point that I'd rather have SlickEdit tagging a complete 8500 file project in 35 seconds vs 15 minutes(clang with VIM), and get the ease of use of a graphical IDE vs the difficult learning curve of a tool like VIM + clang indexing. I wish SlickEdit had the advertising budget of CLion and was as well known. I tried using CLion as a license was made available at our company and it was unusable with my large project, and very difficult to setup as our project doesn't use cmake (it predates cmake). I wish somehow SlickEdit was as well known as CLion - seems CLion has a large advertising budget and is riding their success with Intellij.