Compared to the time and trouble we would go through 20 or 30 years ago to maintain element to element flow no one is worth a crap these days. Why do you think radio cume drops every year over the last 2 decades??
I hate to break it to you, but creative segues didn't build cume, and the lack of creative segues doesn't hurt it. And I trained at the feet of Thom O'hair. If he was alive, he'd tell you that he didn't do them to build cume. Traditional radio goals were absolutely not his motivation.
Progressive rock radio was important to a small dedicated group of music lovers for a short period of time. The grand experiment was killed by Album Oriented Rock, which valued variety over building a flow. And individual show identity was killed by the desire to build an overall station sound. All this happened over 25 years ago.