For me it’s a usability thing—I tend to lose track of SPA tabs, often by closing the window or not being able to differentiate them from content tabs. I do use web apps but I vastly prefer using my machine’s window manager and window buttons/lists.
I use a tool like applicationize (https://applicationize.me/) to make a chrome app for a site. It mimicks an app, but is running as a tab in chrome. Saves memory but gives the benefit of separate window and workspace management (I can tab to it, it can have icon etc).
