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Re:AWS Lambda function URLs: Built-in HTTPS endpoints by jjeaff on Wednesday April 06, 2022 @10:12PM (#30939897)
As others have mentioned, one advantage is that lambda gives you the kind of uptime that would require at least 3 VMs spread across different AZs.

But then, I have been running my SaaS on a single, rented beefy bare metal server in a data center with unmetered data and have had no more than 15 minutes of downtime per year for 3 years now.

Re:AWS Lambda function URLs: Built-in HTTPS endpoints by recuter on Wednesday April 06, 2022 @10:28PM (#30939978)
Exactly, you've answered yourself.

Also nothing prevents you from using multi zoned auto scaling group with a min/max of 1, you'll fail over to another AZ gracefully. You don't magically get 9 nines with lambda in practice either, trust me.