Meanwhile AWS is growing at 20%/year, Azure at 33% and GCP at 35%. That doesn't seem compatible with any kind of major cloud repatriation trend.
One has an issue with the platform-enforced HTTP timeout maximum values.
I migrated that app back to a VM in an hour.
It turns out that the “integration” for something like App Service (or CloudRun or whatever) is mostly just best practices for any kind of hosting: parameters read from environment variables, immutable binaries with external config, stateless servers, read only web app folders, monitoring with APMs, etc…
Sure, you’ll experience lockin if you use Durable Functions or the similar Lambda features… but no worse than any other workflow or business rules platform.
Ask people how easy it is to get off BizTalk or MuleSoft…
I worked at a very small startup years ago that leaned heavily on EC2. Our usage was pretty bipolar, the service was along the lines of a real-time game so we either had a very heavy work load or nothing. We stood up EC2 instances when games were lice and wound them down after.
We did use Lambda for a few things, mainly APIs that were rarely used or for processing jobs in an event queue.
Serverless has its place for sure, but in my experience it have been heavily over used the last 3-5 years.
And you only need to get utilization up to like 15% to make reserved instances significantly better than lambda.