We use serverless, quite happy with it. TBH I mentioned SST in my first comment but I'm not super experienced with it, and I'm reasonably happy with serverless.

I'd definitely be careful in my own decision in trying out SST so I'd recommend doing the same for anyone who is taking my suggestion seriously

Oh and we only deploy functions and their IAM permissions with serverless. All other AWS resources are managed by terraform. I think this was wise