We're entering the age of viable artificial organs. I'll take that over flying cars. Amazing work.
It is amazing, but real organs can sustain themself - artificial mechanical ones not. And need surgery for replacement.
I have my hopes on artificial real organs and see the mechanical ones as a intermediate solution.
Either way, implanted devices can be a good bridge from our current situation.
It's such bullshit that if I stop living for even a little bit my body melts into useless slag like an engine running without oil.
Frankly I wouldn't want one for $1B.
IIRC the longest recorded survival with an artificial rate was about 3 months for a continuous flow 'pulse-less' device https://en.wikipedia.org/wiki/Artificial_heart
So yeah, they "work", but are still far from perfect.
So basically getting a artificial heart as a replacement right now, means taking part in developing science and medicine, but not really realistically with any hopes of living on.