I am more interested in how MCP can change human interaction with software.

Practical example: there exists an MCP server for Jira. Connect that MCP server to e.g. Claude and then you can write prompts like this:

"Produce a release notes document for project XYZ based on the Epics associated to version 1.2.3"

or

"Export to CSV all tickets with worklog related to project XYZ and version 1.2.3. Make sure the CSV includes these columns ....."

Especially the second example totally removes the need for the CSV export functionality in Jira. Now imagine a scenario in which your favourite AI is connected via MCP to different services. You can mix and match information from all of them.

Alibaba for example is making MCP servers for all of its user-facing services (alibaba mail, cloud drive, etc etc)

A chat UI powered by the appropriate MCP servers can provide a lot of value to regular end users and make it possible for people to use their own data easily in ways that earlier would require dedicated software solutions (exports, reports). People could use software for use cases that the original authors didn't even imagine.

I bet it would work the same with REST API and any kind of specs, be it OpenAPI or even text files. From my humble experience.