I was a long time user of CalDigit docks. Over a period of 3 years I think I had 3 fail. It's been a couple of years since I've used one in anger. We're onto TS5/TS5+. I think the last I used was the TS3+. But what I can say is... the technology just isn't there yet, for several reasons:

1. I liked to use a Bluetooth headset. What I really want is to pair the headset (or microphone or whatever device) with the dock, not the computer. As a result, switching just didn't work. And Bluetooth is finnicky at the best of times. This was a pain point;

2. The cables have a really high failure rate. I now buy at least 2 of any cable I buy because I expect one to be bad from the start or fail, particularly the cable between the Macbook and the dock. It has to carry power and a full TB load. 3 feet was best. 6 feet at the time was the longest it could go. I expect there have been teething problems with TB4/5 since. I'm actually curious about the Chinese GPMI standard/cable, as an aside;

3. Thunderbolt itself was generally good because it's well-supported by OSX, including DRMA support. But passthrough for HDMI/DP still felt like it had problems. It should be bulletproof. There's nothing worse than a monitor that might go black occasionally and you don't know why;

4. Generally speaking, handling this much bandwidth requires a lot of computing power. A dock is basically a 100G+ switch.