[thombles]

(author here) Each "button" on the taskbar shows as a label the name of the document. This is the key differentiator that makes W10- so convenient - they don't look the same because they have text showing exactly what you're getting!

[suction]

Strange, on the PC I sometimes use, there are only icons, no text. I have to hover of each one to see the name, but it already breaks down for long names.