[exabrial]

Virtual machines, containers, very similar to partitions and spaces on mainframes as well.

[greenyoda]

Virtual machines are not a recent invention. They were already being used on IBM mainframes starting in the early 1970s:

https://en.wikipedia.org/wiki/VM_(operating_system)

Notably, the VM operating system could run an instance of itself in one of its own virtual machines.

[rvense]

Is it really a pendulum, or is it more that this was always an idea with merit that's now finally seeing wider adoption because it's become more widely available? (In part, I understand, due to some IBM patents that expire 10 or so years ago)

[madmulita]

And serverless is an anemic CICS executing non-transactions.

[dsego]

Serverless is kind of like Apache running PHP scripts in virtual hosts.

[vp8989]

The greatest trick the devil ever pulled is convincing people that shared hosting is preferable to dedicated, and then charging them way more money for it.

[exabrial]

The cloud is just someone else's computer in a data center in new Jersey about to be hurt by a hurricane.