I'd much rather offload more specific responsibilities to my lambda functions than put my entire API in lambda. I've worked on several projects that grew beyond

I'd much rather offload more specific responsibilities to my lambda functions than put my entire API in lambda. I've worked on several projects that grew beyond the limitations of lambda / serverless and required extensive rework. Other commenters have mentioned cold start and runtime issues. Another issue is that if you have constant load, your lambdas become defacto instances, but are much more expensive. Lambda is great for "bursty" compute. If you have constant load but you want scaling, you could try running your workload on a cluster.