Original A7 video vs A7II (and up)

[Ddilla]

Firstly, I apologize if this is a troll question, or if it's been asked before. I am new and this is my first thread. I'm excited to gossip about cameras with you all (I know my girlfriend is sick of hearing me ramble about cameras)

How much worse are the video capabilities in the first Sony A7 vs the upgraded A7II and following models? (Ie. A7s, A7r, and the newly announced A7rII)

I know that after the A7II, each following model has s-log and higher bitrate video (with the addition of XAVC codec.) But how much worse is the video image in the a7? Can we also eliminate any talk of moiré and aliasing please ?

Can the original A7 still achieve a flat picture profile?

Will the A7 be discontinued soon because of the A7rII's announcement?