[user5994461]

I don't know of any service that was dropped on either of AWS or GCP. Features are dropped though, they can't be ordered from new accounts then they disappear eventually.

I don't think that you can order older instances, or run instances outside of a VPC, not sure if non-HVM AMI are still supported.

AWS has a strategy of leaving offerings to rot and making a new thing that you have to migrate to yourself. For example, the 3 different types of reserved instances or ELB vs ALB. It has its pros and cons. Google has less products that are more capable and feature complete.

They are both rather new and creating new products instead of removing products, it will take one more decade to see how they handle depreciation of core products, when any actually gets retired.

[scarface74]

You can't run EC2 instances outside of a VPC if you have a new account. If you have a very old account you still can and every now and then they announce a new feature that works with them.