Sublime Text's text search is the killer feature for me. CTRL+SHIFT+F and I can search a million LOC+ codebase instantly, navigate the results with CTRL+R, do a sub-search of the results with CTRL+F, set bookmarks with CTRL+F2 (and jump to them with F2/SHIFT+F2), pop the results out to a different window for reference, etc. And all that happens with no jank whatsoever.
The LSP plugins make life easier, but even without that Sublime is often able to find where symbols are defined in a project using just the contextual information from the syntax highlighter.
I tried CLion for a while, but couldnt get productive in it. Ofc I'm much more experienced with Sublime, so maybe I just didnt give myself enough time to learn it, but CLion felt sluggish and inefficient. The smart code features are probably more advanced than Sublime's LSP plugins, but I didn't find anything that would make the switch actually an improvement to me.