What people have to realize, although Carbolite 103 is quite good compared to many 1020/1030 Hi ten, High carbon, seamed tubing from the past, I think mostly because of it's slightly lighter weight but still being stiff enough, I suspect that without Peugeot's frame design/geometry, Carbolite 103 would not get as many praises given to it today.
Boy do I still miss my modded up 1982 Carbolite 103 framed Peugeot PH10S! One of the best riding bike I ever owned. It was a joy to ride. It handled well enough for any fast riding I was doing in college, Tracked laser straight and was "quiet" enough for me to ride safely just an inch or two away from my brother's rear tire for miles and miles. It also whooshed forward aggressively when I put the hammer down and the bike "sang" to me it's beautiful jet-like whistling song through its frame on long fast roads. It wasn't perfect (it flexed quite a bit at the BB on climbs and hard sprints so I got a lot of FD chain rub, but the frame still felt lively as it sprung back nicely from that flex. The bike never felt "dead" as many bikes built with "gas pipes" felt.