I have a lot of movies on Plex, but when we browse them it's rare for us to select one. On the other hand, we often watch those movies when they're on TV. "We have that on Plex" has become a household joke.
Amazon I think have a "watch party" feature, but that's not the same as 10 million people all watching Mr Blobby get gunged. There seemed to be a small amount of cultural "togetherness" with the guy doing the PE (Joe Someone?) during lockdown, not sure as I didn't watch it (too busy working).
But yes, events (sport, moon landings, etc) are great on linear tv. I suspect that even after most of the spectrum gets removed, there will remain a BBC linear TV channel for events for some time, and most households will have a working antenna for a long time to come.
(1) Based on what I've seen from spending many hours scrolling through their available content (or what the algorithm will show me of it, anyway!), I'm not actually sure Netflix could put that content together into a 24/7 program that resembles a linear TV channel, even given how repetitive and often shitty linear TV content is. I could definitely be wrong about this, but I think Netflix lacks both the dynamic breadth and thematic depth of content. On the "dynamic breadth": Linear TV is at least 95% repeats, but if you watch it one day and then watch it again 6 months later, the content in your latter watch will usually be totally disjoint from the first watch. Meanwhile whenever I go on Netflix I swear like 75% of what I'm shown is things they were showing me 2+ years ago. Maybe they could still assemble their content into a 24/7/365 schedule that mimics linear TV programming, but I wouldn't bet on that.
(2) A linear TV channel isn't just a bunch of shows concatenated one right after another. At a minimum it has interstitials between shows/segments telling you what's next and what's on later. These are what gives the channel its personality/brand, and I'd assume it takes at least a few full-time staff per 24/7 channel. Think Discovery Channel's "Shark Week". It was mostly a bunch of repeats of shows they already had that happened to be shark-related, but the interstitials for it marketed it into a national event. And, dare I say it...linear TV often has ads. Ads can be a nice part of TV (especially for shitty/campy TV) -- they're when you go to the bathroom, get a snack, and/or chat about what you just watched. Certainly not a required part of linear TV (HBO and BBC are good linear TV channels and don't have ads), but hard for Netflix in particular to recreate if they were aiming to replicate the full linear TV experience.
I also think the shared experience of many people watching the same thing is part of the "event" nature of TV.
But I've seen both movies probably a dozen times at this point.
It's always been a matter of me stumbling upon it while channel surfing (1990-2005) or "guide scrolling" (2005-2018), landing there to kill a few minutes, and watching through to the end. A couple of times I've gotten lucky and caught the movie at the start, so I can actually say I've seen these movies. But I've seen way more of the middle and end parts than the beginning parts.