I have a TS3+ that broke about 18 months in. I talked to support, set up a repair, and before I could send it the dock unbroke and had worked since. Truly mysterious and left me with a sense of unease with that thing given the cost.

My Caldigit TS4 dock is so close to being perfect except for my secondary monitor turning on maybe 50% of the time if I connect it to the dock via USB-C, I've given up and now have USB-C from the secondary monitor going straight to my laptop but let me be entirely clear in saying I hate that I have to do that.

Very similar story here. Went through two Caldigit TB hubs most recently a TB4. Soooo many issues. The same Ethernet issue described above, a failure to provide the rated PD power, and the TB linked monitor connection was dodgy af. A very expensive lesson. Add to this the confusing (and deceptive) jumble of TB cable standards. I have so many supposed TB3,4 and 5 rated cables I could probably circle my house. You have to hand Apple one thing and that’s the consistency of their hardware due to tight control of the stack and supply chain. You get far fewer of these sorts of issues.