Very true, which is why I, as a manager, ask senior devs during interviews why they made those choices and how they integrated and deployed the changes. In a lot of cases it turns out their flashy new tech choices were for one-off greenfield projects that were support systems and not primary production systems. I'm usually more interested in how they improved prod systems using the existing stack. This helps me figure out if they're into maintenance work or if they're only interested in tinkering with shiny new things. Both activities have their places on dev teams, but I take it consideration for the actual role I'm filling.
