Just wanted to call attention to this, in case the SST guys hadn't seen: https://aws.amazon.com/blogs/developer/increasing-development-speed-with-cdk-watch/ SST has several features not included, but it seems AWS is starting to think along these lines in a small way.

Yeah we've looked at hotswap. It's a nice feature but ultimately it still needs to upload the whole code every time

Good to see that many are looking into solve the same problem.

Been using hotswap and it's great