I guess this was resolved by serverless 4 beta, though it's a pity the team wouldn't take the trivial change to support for v3.

Really weird... The team did v3 release adding support for java21 while skipping similar trivial change for dotnet8 😞
@martincostello if possible, could you reopen the issue and update name/add label to link it somehow to sls@3?

I could re-open it, but I have no ability to do anything to force a release.

The maintainers seem to have no interest in making this change for v3: #12368 (comment)

I had the same feelings until I dug a bit deeper and saw that the java21 issue was not the same as dotnet8, in that it's not just a warning, there's also a line of code that specifically checks the java runtime version in order to invoke the lambda locally, and this check doesn't exist for dotnet.

e4dfebd#diff-a9b73bb11f3695264fd5588c011cff0aa048ae0bce44ddd7430f96b4c6e06033R269