The CalDigit TS4 that I favor is back in stock:

https://amzn.to/3lBTR0R

I’ve understood some people have had some minor issues with it, but for me it’s been pretty much perfect.

Amazon.com

@caseyliss FYI, for anybody having issues, CalDigit released a firmware update to the TS4. It's a bit of a pain to install, but may help for those that bought early on.

https://www.caldigit.com/ts4-macos-firmware-update-procedures/

TS4 macOS Firmware Update Procedures – CalDigit