For what it's worth, while I haven't found kdenlive (or shotcut, based on the same underlying toolkit) to be 100% stable, I've had significantly fewer lost-work incidents with kdenlive than I did with Premiere Pro. The frustration of Premiere's instability was the main thing that drove me to open-source software.

I've never used Resolve primarily so I don't have a good feeling of how they compare, but I have experienced a couple of unexpected, mid-work crashes in Resolve as well. I believe these were tied to my working on a machine with an Intel iGPU, which at least at the time seemed to be... discouraged, I'll say, by the Resolve community due to known stability issues. Possibly the root of evil with Premiere as well, but again, doesn't seem to be a major problem for kdenlive.

What I will say is that I personally prefer Shotcut to kdenlive. Both are basically graphical frontends to MLT, the actual media toolkit/editor (driven by XML files). Shotcut has a simpler, more user-friendly UI than kdenlive and also seems to be a bit more stable/performant. kdenlive is more featureful. I think most people should try both because it probably depends on your workflow which is more convenient.