> I'm actually not aware of another one that uses proxy files on Linux..
FYI, Blender can user proxy files, although I don't think there is an option to automatically create the proxies when you add a video clip.
probably even better than Kdenlive >>>
They aren't in the same league. Resolve is used in Hollywood productions. The license is cheap, 300$, If you wanted to buy it, the free version works great. The big hardware console for Resolve is 30k.
I'm actually not aware of another one that uses proxy files on Linux, and with even cell phones shooting at 4K any video editor that doesn't is unusable in most cases.
DaVinci Resolve is also extremely good (probably even better than Kdenlive), but it's a commercial software although they do have a free unlimited version.