Measuring the impact of answers, comments and edits on users asking more questions on Stack Overflow: https://meta.stackexchange.com/questions/311504/what-can-we-do-to-encourage-or-discourage-a-second-question
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Co-Authored-By: An old Stack Overflow answer, blindly accepting the compiler's suggestions, and a linter.
ASTs typically discard comments, and that's usually what you want.
The only time (AFAICS) that preserving comments is useful is for writing a code formatter.
Could you write a formatter in terms of a list of lexemes? A CST is a non-trivial bit of code for one use case.
It's incredibly hard to explain adversarial problems to users. I see gamers sincerely asking "why doesn't the publisher just fix the cheater problem?".
This is exacerbated by the fact that sharing too many details of anticheat can make the problem worse.