Lambdas broke checked exceptions. You can't declare that you throw whatever a generic lambda might throw, so they quickly devolved to "I throw nothing (only unchecked)." The "I throw everything" alternative is rarely used because it spreads virally through every caller.

While Java usually gets the blame, it was following a precedent set by CLU, Modula-3 and C++.

Also I dearly miss them in .NET, every single time something breaks in production, because some developer didn't bother to catch exceptions, when they should have.