Altium is probably the only clean PCB experience at the moment, and even that sits at 10% CPU on my machine with an empty schematic and no PCB open. The more esoteric tools like Mentor and Cadence's tools (and presumably Keysight's offerings although I can't get a student license through my university * ) are powerful but quite difficult to use working alone in the sense that schematic capture is quite slow because you need to (if I'm not doing something wrong) source your own library or make your own - not really competing with Kicad as such.
* The student license options these companies have are absolutely insane. You'd think they don't want people to learn to use their software. Altium's site doesn't work with non-american email addresses, Mentor doesn't include any RF/Thermal/Mixed-Signal simulation addons i.e. the only reason to learn to use it over kicad, Cadence took about 2 weeks to respond and ended up publishing a Photo of my student license with my name on their website if you know where to look (Indexed by number)