I'm a millennial, so maybe that's why I'm not familiar with slide nights.
Yep - no issues there. But so you know, I have trip photos saved on DVDs too :D
And yeah, it is that depth of discussion, and then the side stories that come up from a single photo. The photo is not the point, it is the experience behind it. When it comes to social media though, there isn't the depth and people can't be bothered typing decent conversations in many layers.
I think we have some of those of when we were kids.