I don't get a lot of fuckups on deliveries but I rarely order something fancy and most places used to delivery, as you say, know the music. Don't have a ton of issues but yesterday I had something where the delivery guy apparently took the gig but didn't move and after it started running late it was switched to another. It's rare but it maps to the issues I ran with a couple of time with the cab service.
For anything elaborate I'd rather eat at the restaurant. Except Lebanese, those are always pretty on point with separating hot and cold, plus conditioning in general.