Whose promise? According to tax and immigration laws that is certainly not the case in most of the world.

The many blog posts (from people doing it) suggesting working remote and traveling the world is as easy as getting a remote job and travel the world:

https://www.theladders.com/career-advice/how-i-perfected-tra... https://doist.com/blog/travel-remote-work-digital-nomad/ https://www.refinery29.com/en-us/remote-work-digital-nomad https://www.thebalancecareers.com/working-remotely-while-tra...

etc

Here's a US tax attorney talking about it:

https://www.whereverwriter.com/digital-nomad-tax-questions/

In many cases, you'd be working without a work visa. Of course, many people do it and get off with it. But there are occasional crackdowns. [1] Perhaps more to the point, as the sibling comment asks, "Whose promise?" GitLab explicitly requires you to obtain permission from your manager before moving elsewhere for an extended period. [2]

[1] https://www.chiangmaicitylife.com/citynews/general/immigrati...

[2] https://about.gitlab.com/handbook/people-group/global-compen...