[pornel]

I use USB-C-to-DP cables as well as full Thunderbolt and haven’t had issues with them.

USB-C cables can be garbage, so you probably need to get a better one.

[startupsfail]

Well, here is one example. I use the cables that came with the portable monitor. When I use a miniHDMI cable, no problems. With USB-C the monitor drops the connection and blinks every so often.

Here is another example. A coworker came crying that her monitor is dropping connection. We’ve tried an HDMI cable (this is a full size monitor connected to a laptop), problem disappears.

It’s a difference between working reliably (like an HDMI cable) vs working sometimes, if you are lucky.