List comprehensions are more a substitute for map than anything else (which is generally discouraged in the ecosystem). For comparison: `map(lambda x: x * 2, range(10))` vs `[x * 2 for x in range(10)]`.

However lambdas are mostly discouraged because they're often harder to read for anything non-trivial (and really you can't do much non-trivial with them since they are so dwarfed) and you can just define a function in the same block and pass the function reference in place of a lambda. I think the premise is more that it's clearer to pass a clearly named method describing the intent instead of a lambda describing the how.