USB-C connectors are much less reliable than their predecessors due to their design though. I have several connectors that failed, either they no longer grip the cable securely or they just lose contact randomly.

I'm sure it's handy for mobile devices where size and versatility trumps everything, but on laptop/desktop machines where longer-term usage is expected I would prefer something more reliable.

Are you comparing USB-C to its direct predecessors, things like (micro-)USB-A/B, (mini-)HDMI, and (mini-)DP, or to more distant ancestors like PS/2 and D-sub/VGA/DVI?

Comparing to USB-A specifically.

C is absolutely better than the micro/mini variants, but not the full-size ports.

Interesting. I can see how USB-A has better friction/grip in the port (when made properly anyway), but I can't say it has better longevity; I've broken plenty of USB-A connectors and even ports. I am also glad to be rid of the "which way is up" dance, and I don't think anyone has shed any tears for the loss of USB-B.

USB-A has much larger pins, meaning it will continue to work even if slightly damaged. USB-C has much higher pin density so the slightest misalignment (due to damage or just bad manufacturing tolerances) causes dropouts.

I'm just salty because I will have to replace either the ports on my Macbook or my USB-C wireless headphone receiver (both are a pricey endeavor, not to mention the downtime of having the laptop shipped for repair) just for the same issue to most likely reoccur a year down the line since it wasn't a result of any kind of misuse (both devices are exclusively used in an office environment and otherwise in brand new condition).