Hubble needed several shuttle repair missions over its life including a critical one needed right after launch to fix badly misaligned optics.
Webb is going to deep space where there is no chance of repair if anything goes wrong. The unfolding process alone is insanely complicated. Personally I am not optimistic.
You are right to skeptical.
I give it a 1 in 7 chance of making space.
a 1 in 30 chance of working correctly Years late and massively over budget. How NASA....
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I hope they remember to take of the mirror covers.