If your definition of a monolith refers to a singular server, then I've never worked on a monolith in my life. Even the crufty old ASP apps I used to work on weren't monoliths.

This would also mean that deploying a microservice architecture onto a single server, using docker for example, would be considered a monolith. Or even better, any application that leverages a database on a separate server is no longer a monolith! That's way easier than rearchitecting your whole app.

I've never come across a definition for monolith in the context of software that had anything to do with the actual infrastructure employed