ZigBee is already so widespread that I don't see it going away. I'd be much more worried about your WiFi devices.
While WiFi as a network technology certainly isn't going anywhere, most WiFi-connected devices talk to a service on the internet. You probably created an account somewhere to manage your WiFi devices. So if the manufacturer shuts down their service, which happens all the time when they either shut down the whole business or abandon a product line, you will have no way to manage your devices.
ZigBee will continue working as long as your hardware does, because you control the software managing it.
There's not much point in optimizing completely for price per inch, but when I bought my TV in 2013 I plotted this, and discovered a pretty sharp hockey stick in the graph at 70" and above. So I got a 65" TV. If my graph had looked pretty straight like yours I'd probably just get the biggest that is practical for the space.
That's why you're getting that stuff. They don't (want you to know they) know anything about you, so they're just feeding you the generic sludge which generates the most engagement: Ragebait. My history is enabled, and I just get an endless flow of woodworking videos, nerdy facts and comedians.
They may not even be trying, it's just an inherent feature of the business model. They make money from ads. The more time people engage with the content, the more money they make. People argue more in the comments (or, in other words, engage more) when they're angry. So by tuning everything for max revenue you get ragebait bubbling up as a natural consequence.
The A in ADSL literally stands for "asymmetric". If you want matching upload you'd use SDSL. But generally you don't want that, because it sacrifices some download speed.
For others considering this, keep in mind that not all phones support external monitors, they need specific hardware for it. Pretty much all Samsung S phones support it, Pixels do not. So check if your phone supports external displays before you buy any hardware!
We may have just gotten lucky. I also had a great time in Venice once by wandering off randomly and ending up somewhere I can only assume tourists don't normally go. We bought some fruit off a boat which was both delicious and very affordable, so I assume the target demographic was not tourists. I'm pretty sure that's not the universal experience of Venice either.
We were in the mood for a chill day, so it was nice to just chill in a park and walk through some random old neighborhoods until we stumbled across a restaurant. There's nothing chill about Milan, though, at least not where a clueless tourist would find it.
As a European from elsewhere in Europe, I'm never going back to Milan. Maybe it's fine if you're into fashion, but if you're not there's not much to look at except a cathedral which resembles every other cathedral, and it's impossible to get a photo of it without also having a friendship bracelet scammer in the frame, actively harassing you.
All tourist locations in Italy and France have people trying to scam you (and some non-scammers just trying to sell you cheap toys), but Milan is the only place I've been to where they're straight up harassing you non-stop. Go to Pisa instead, it's super relaxing there and you can marvel at their past mistakes in structural engineering. A far better deal.
I read somewhere that traumatic brain injuries are correlated with voting Republican, but I don't know if there's any causation or in which direction it goes. A lot of Republicans might just have lives where they're more at risk of getting injured.
To be fair, any modern truck built for the US market will kill you on the spot, usually by squishing you like a bug against the grill. A Cybertruck is low enough that it will probably just chop off your legs, so you probably still die, but you can have a half open casket! 🎉
ZigBee is already so widespread that I don't see it going away. I'd be much more worried about your WiFi devices.
While WiFi as a network technology certainly isn't going anywhere, most WiFi-connected devices talk to a service on the internet. You probably created an account somewhere to manage your WiFi devices. So if the manufacturer shuts down their service, which happens all the time when they either shut down the whole business or abandon a product line, you will have no way to manage your devices.
ZigBee will continue working as long as your hardware does, because you control the software managing it.