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You will definitely run into more cold starts though, if that is a consideration for your project

A serverless function that never cold-starts is just a container.

That doesn’t mean that more cold starts aren’t bad.

Sure but if you can’t tolerate the added latency of a cold start, serverless might not be right for you.

Conversely, if you’re doing something like processing message queues and you don’t care about latency at all, serverless is perfect.