Elon can't help himself on Twitter. He stated 6 more launches of 60for initial activation, 12 for significant coverage.
Suggests at least that when it launches tomorrow, he thinks all 60 will deploy without failure. Will be quite something. It may not be enormously challenging for SpaceX but 60 satellites is just wow. The machine gun of satellite deployments.
He also said:
In the same Twitter threadMuch will likely go wrong on 1st mission. Also, 6 more launches of 60 sats needed for minor coverage, 12 for moderate.
So I think you may be mischaracterizing the optimism level. Especially if you followed the info session yesterday.
From Everyday Astronaut's coverage of the call:
60 sats are production design, with no KA antenna. Some of them might not work, small possibility none will work. Crazy technology and they're very hard.
Biggest concerns, solar arrays, phase array antennas, ion engines. Lots of new technology on the satellites.