The brain upload isn't for power or personal immortality. It is for the thought patterns of the time to be accessible as a library or intelligent servant so that later generations may prosper.
If I am fortunate, I will be so preserved, and they will overrule me most of the time, using me the way I use (say) Karl Popper's books: as a reference, not as immutable truth, and not as the sole tool to make decisions. My mind is far more general purpose than a book, so it will be tempting for them to treat it as a sole tool, but I'm counting on them being smarter than me.
And if they deem me, Gen 1 uploadee, only worthy of jokes like we see Alicebot, so be it. If I am to be deleted as I am superseded, so be it.