I has become my go-to tool for many reasons.

- there is an electron version but also a web version which almost works as well which can be great in environments where downloading an electron app is hard.

- many enterprises with Confluence have a plugin in Confluence for embedding drawio.

- embedding the source in .png etc.

- support for UML shapes without forcing me to obey all the rules allowing for quick and dirty sketches.

- quick to use, decent usability.

- acceptable learning curve so I feel ok recommending it to others.