I've don't think I've ever used an Adobe product. While they may be huge in specific fields, there are other options. Yes, extra time, training, and money will need to be used to move to alternatives, but what's the other option? Continue giving Adobe money and support their monopoly? Be the change you want to see.
Refuse to use the applications and consult with the school board with your concerns. Involve other parents and start a movement.
Use a different local school system. Is there a local private school that's better?
Home schooling is another option.
I'm not saying any of those are easy options. In fact, you may have no good options today. But you don't need to stay that way forever. Explore what options you could have next year, or the year after. What can you work toward?
At the end of the day, the more everybody gives in and allows the abuse to happen, the move it will be normalized and accepted. If you don't like what is happening, then make changes in what you accept in your life.
I hear your frustration, but there are other options. They won't necessarily be the same, or perhaps equivalent in every way, but they do exist. You don't have to use the same corporations over and over again.
Last time I used Windows on my own was back in the XP days. I saw some of the early Vista and it was even worse. I can't imagine what the recent versions are like.
You're not alone, but even people who claim to want privacy are typically unwilling to stop using the very things that violate their privacy. I suspect that until that changes on a mass scale, the expectation that you should give up your data will remain.
You make a valid point, but I have to disagree about the need to collect the data without consent. I think the key here is opt-in. The way cellular devices currently work there is no way to use one without the location tracking. That is not technically required. It's a design choice on the part of the telecommunications companies. Let's imagine a telecommunications infrastructure that does not and technically can not track identifying location information. With such an infrastructure, the potential for abuse is immediately gone. Then let people opt-in to location tracking services using apps or other features on their device on an individual basis. I'm not against giving people individual choices. It's the forced location information gathering that needs to go.
It's a small step, but does not solve the issue of location being tracked to start with. A better law would be to ban the tracking of location without consent, along with banning requiring location tracking for services that don't technically require it.
I host my own. I'd say my contacts are split between XMPP and Matrix with many people having both. A lot of business use self hosted XMPP servers too. For example, Cisco communications solutions are based on XMPP.
The issue with free public servers is that you have no accountability. If they go away, or are left unmaintained, there's nothing you can do about it.
My two cents, host at home, or at an infrastructure provider you pay for service.
There is no such thing as a private cellular device. It does not matter if it's a smartphone, dumb phone, or simple internet access device.
Cellular devices are location tracked and their owners profiled. All devices have proprietary cellular modems that communicate over the network and have full access to your system. Nothing you do on device will stop that.
The only exception I've heard of is from Purism. The Librem 5 claims to separate the base system from the cellular modem, but that still won't stop the location tracking.
Point blank, you can't carry a connected cellular device, and have privacy. They are mutually exclusive goals.
The lose of signal won't matter. It happens to me all the time as I move from wifi to wifi.
For your third question, it depends on if you a have a key backup with a key security code. That's something you should set up asap after your initial client login. If you do, then you can recover. You might want to look at https://github.com/vector-im/element-web/issues/16202 for more explanation. The question comes up a lot.
Regardless, I'd make sure you're always logged in twice if you can. Do you have Element Web running alongside Matrix? If you do, keep logged in on a desktop, or laptop. Just in case you lose the phone.
I've don't think I've ever used an Adobe product. While they may be huge in specific fields, there are other options. Yes, extra time, training, and money will need to be used to move to alternatives, but what's the other option? Continue giving Adobe money and support their monopoly? Be the change you want to see.