Earlier quoted context omitted.
"That’s to say that real-time collaboration is a luxury feature." So were toilets once upon a time. I am not a fan of webapps, but this line of argument doesn't hold water
I rather have a toilet than saving two clicks. —- real-time collab is not exclusive to webapps.
Sure, but once you make the effort required to build a real time app, there are vanishingly few reasons why not to have it as a web app. Some of them provide a desktop app as well but they all provide a web app.
As a designer, you can just send a link to your design to anyone, end users, clients, developers, managers. And they just click it and it shows up and works. No need for installing software, setting up accounts, etc. A lot of these web apps are actually C++ and then compiled to web assembly so they are quite fast.