Uhhhhhh........who told you they didn't have television in 1945? Part of me wonders if this is a rich vs poor perspective, or if maybe it's a country location perspective? They started inventing the concepts of television in the 1880s, but consumer versions wouldn't be commercially available until the 1930s. They weren't in every household in the 1940s, but they existed.

I think a good analogy would be the internet. People have this misunderstanding that the internet just randomly suddenly existed around 1995. When in fact, the technologies behind the internet date back to NASA in the 1960s. The reason the Internet started exploding around 1995 was because Windows 95 changed everything. Go on and hate microsoft all you want, but go on youtube and try watching videos of someone using Windows 3.1. I had that as a kid. I cannot for the life of me imagine having the internet on Windows 3.1, but Windows 95 just feels still to this day like a semi-modern OS design. I would argue that it's a better OS than Windows 11.

It was that accessibility that created an explosion of adoption rates. Even at 28k. Which I can't remember if that was the max at the time, or if that's just what my dad paid for at the time. It could be either.

They're being a pedant for no reason because there's a difference in definitions but the "modern era" began in the late 15th century.

https://en.wikipedia.org/wiki/Modern_era

You obviously used it in the more casual definition though.