I have a similar setup and decided to install it on my degoogled phone because I definitely wanted to use a VPN to connect to Whatsapp and my other phone is an older Android without the global VPN option.

I have it completely isolated from my main account by using Shelter from F-droid, installing Aurora store in that sandbox and then installing Whatsapp from Aurora into the work profile created by Shelter.

This way, my main contacts and media are not accessed by Whatsapp. It does its own separate thing and I have no other apps interacting with it.

The reason they are blackboxes is because they are function approximators with billions of parameters. Theory has not caught up with practical results. This is why you tune hyperparameters (learning rate, number of layers, number of neurons ina layer, etc.) and have multiple iterations of training to get an approximation of the distribution of the inputs. Training is also sensitive to the order of inputs to the network. A network trained on the same training set but in a different order might converge to an entirely different function. This is why you train on the same inputs in random order over multiple episodes to hopefully average out such variations. They are blackboxes simply because you can’t yet prove theoretically the function it has approximated or converged to given the input.

I agree. I only use Brave for very specific purposes - somehow my bank doesn’t like my Firefox configuration, and mostly to access Google maps. Otherwise I use Firefox and its profiles for all other activities.

Depends on if they used cryptographic signatures. Those would be impossible to spoof because any change in the client would change the hash completely.

I couldn’t have been more eloquent myself.

If you don’t mind paying, Protonmail. I pay €12 per month for mail and VPN combined however it is cheaper if you only want the email option. I haven’t used Gmail in about three years now.

Degoogling is a long and difficult process. I highly suggest you start with small steps. For example, you could start using Invidious to watch Youtube videos. It is definitely not without bugs and you will run into issues. Change your search engine to Duckduckgo or Brave or whatever else you prefer. For general searches, these are good enough. Unfortunately, for addresses and navigation, Google Maps doesn’t have a good enough competitor that I know of. I urge you to make Firefox your daily driver if you are still using Chromium-based ones. I have Brave browser as an alternative for sites like banking or to access Maps or Google search. Start an alternate Protonmail account while still using Gmail. Be warned though that the free tier has 500MB, the paid tier 500GB.

If you want to go full hardcore, look into Graphene or CalyxOS as a replacement for your Android. I specifically bought myself a Pixel phone so I can get a degoogled OS for my primary phone. I still have a secondary phone running Android for banking and paying which I turn off when I do not use it. Look into Shelter to freeze apps. For example, Uber doesn’t need to know your whereabouts when you are not specifically looking for a cab.

But please, please, DO NOT start doing everything all at once or you will get overwhelmed. I now almost fully use open source stuff, and I pay and donate for services. I think this is the only way to show support for the projects you love and to have a voice against big tech/ad tech.