I think it mostly depends on the particular engineer and the engineering culture of the team/company. I was hanging out in a coffee shop a while back, and some software engineers who looked extremely young happened to sit at a nearby table. I couldn't help but overhear them excitedly sharing their fun terminal/shell customizations with each other.

I don't think a willingness to engage in such things is a prerequisite to being a great software engineer, but it somehow warmed my heart to see that the younger generation could still find joy in such things.