(Only quoting hockey as the latest example, not directly responding to this post.)

I also am a "10 hours from key-in-hand to pickup." That's not to say there aren't (rare) exceptions, and every time is a case-by-case basis--but my default is 10. Hockey's post summarizes exactly why I don't bother with CT (even if their hold times weren't beyond anything I'm willing to do) nor the DP (who, even if everything goes smoothly with contact, may have pushback, mild or otherwise). Straight to Crew Assist for me, and I don't even wait for a response if it's not immediate. Last time I had this situation (~3 weeks-ish ago): I put the message in ("Please pass to Crew Tracking: late arrival, need to adjust pickup time for rest, will be in lobby for pickup at XX:XX"); got no immediate response; showered & went to bed; got up in the morning, and discovered a response had come at some point. That response wanted to play 20 questions about was trans delayed, the hotel delayed, etc.--all of which I was blissfully unaware--but, the pickup, report, and push times had all been adjusted.