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BlueKey
SimpleX isn't able to share your profile-data between devices. Instead you connect with e.g. the desktop app to the phone to use the phone-profile, but it need to stay online, which can be inconvenient.
With the CLI version you are able to run it on some (private) server and then connect the phone and desktop app to it. But it is still not really convenient, as you need to establish a tunnel (for example SSH port forwarding) to the server (the clients don't support connecting via internet URL the last time I checked).
As far as I know you still need a phone number to create an account. But for connecting you can use the new usernames (and make sure to disable automatic number sharing with contacts in the settings).
SimpleX doesn't need a phone.
The desktop app can run standalone or linked to the phone-profile (but the phone must stay connected for that).
They also have a CLI version (which you can use as a central hub for your profile).
Session is cool but sometimes unreliable in the delivery.
SimpleX is also quite interesting. But I don't use it enough to say something about the reliablity.
I have the "cilantro tastes so that I need to throw up" gene but I don't smell ants.
na reifen, steht doch unten
In any Base-x system, one digit goes up to x - 1 (with base > 10 we use alphabet letters), then the next digit (to the left) is incremented.
So in our normal Base-10 system, you count up from 0 to 9 and then add a digit in the front and reset the other digits to get 10.
This means, that in every Base-x system '10' equals x.
So you can make the "There 10 types of people ..." with every base as '10' in Base-2 means 2, 3 in Base-3 and so on.
You forgot the ones who expected it to be in base 4.
But as you mention, NaN propagates.
So at checkout, your wallet will become NaN, as the shops money balance. Then it will spread to your bank account and before you realize what happens the whole banking-district is in flames.
I'm in the "c-h-own" team.
I see what you mean, so let me try to explain:
You don't have an ID for the account (like a username, random number or even public key) but instead an address for your chat with someone (this is the queue where your chatpartner sends their messages to). So every address is unique only per chat, no unique ID per account or so.
If you still have questions about the SimpleX system, feel free to ask and I will give you useful links.