It's surely much less of a problem than most non-technical users wondering why Wikipedia URLs start with "en" instead of "www".

They might wonder (although I doubt it), but it’s nothing actionable.

With m., they used to see a mobile layout that’s a really poor fit for a desktop screen and that they would have manually switch out of via some relatively obscure button.

I'd be surprised if anyone but the oldest non-technical users had any idea what the "www" was or why it would or wouldn't be at the front of a URL. It takes zero technical knowledge to understand "en" indicates the language and probably rarely comes up since you can use www or omit the en and links mostly just work.