While masks are shown to slow the spread of infection, ultimately the larger problem with handling the COVID-19 pandemic was the lockdowns and isolation. Lockdowns and isolating individuals definitely helped reduce the spread of the infection and probably saved a lot of lives but prolonged isolation actually reduced the overall immunity in our population. Human immune systems require constant exposure to all sorts of germs to keep it humming along. Isolation does the exact opposite and while it is useful in the short term, prolonged 'clean room' type conditions created due to isolation and lockdowns are harmful.

On a related note, this also demonstrates the danger of centralized cloud services. I wish there were more players in this space and the governments would try their very best to prevent consolidation in this space. Alternatively, I really wish the CS did not have this centralized architecture that allows for such failure modes. Software industry should learn from great & age old engineering design principles. For example, a large ships have watertight doors that prevent compartments from flooding in case of a breach. It appears that CS didn't think the current scenario was not possible therefore didn't invest in anything meaningful to prevent this nightmare scenario.

My perception is that, people were partying & were drunk. The Waymo vehicle likely was just passing through and probably got stuck. People simply took out their pent up frustration on it. It's nothing more than that.

More importantly, Apple doesn't fab its own chips. TSMC does. Everyone has access to the same vendor. Similarly everyone has access to ARM cores. Yet somehow Apple managed to build an Intel/AMD competitor and others didn't? What am I missing?

Now to address your original concern about Bluetooth. Bluetooth is not the best fit but Bamboo printers do have WiFi. They can host local web UI which is what pretty much every other product does. It requires will and resources to support offline tooling for users though. It also reduces the probability that the user will subscribe to their cloud services, if any.

Coming to the point of an App only working at home. Well, there are several ways to address this issue WITHOUT requiring a user to use their Cloud offering. A simple way is to EDUCATE your users that the app will only function on local wifi. Average users are smarter than you think. If the user would like their app to work when they're not home, offer them an option to connect to the cloud but do not make it mandatory. Next, the printer can use a combination of UPnP, Dynamic DNS to expose it over the internet. Yes, it is scary to do this but with the right security practices it is possible to expose your printer over the internet so your app can reach it. You don't need their cloud to be the intermediary.

Finally, these printers will likely stop working entirely if the company goes out of business or decides to wind down their 3D printing business or just plain planned obsolescence of specific models. All in all, subscription & online paid services for hardware products is an anti-consumer model.