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Negotiations happen when one or, more likely, two sides don’t see a way to improve their positions with military force.
The rumors you’re speaking of are a direct consequence of Russia being an autocracy. When you have a country whose ruler doesn’t leave on their own (a dictator), people start speculating on when he’s going to die. These rumors have been going around for about a decade, I believe, and are pretty much meaningless.
Now, about “securing a legacy.” I think it’s much more trivial than that. Invading Ukraine was a good way to secure presidency for the next 1-2 terms and to eradicate opposition within the country. If that’s the case, then, in a sense, he got what he wanted, although he likely also expected the war to be short and victorious (judging by the state media narrative at the time). That didn’t happen. And now there are other issues at hand for him.
Mind you, there are two types of under screen fingerprint sensors: optical and ultrasonic.
Optical blasts the finger with light and forms a 2d scan. It’s pretty slow and arguably worse than conventional (capacitive) scanner on the back of the phone.
Ultrasonic, however, because it uses sound waves, maps a 3d scan. It is significantly faster than conventional scanner, and it also doesn’t care about your fingers being wet.
Ultrasonic sensor only requires a quick tap to unlock the phone. It’s actually really convenient to use, I like those. I’d take the capacitive sensor over optical one, though.