What’s the point?
If you die of old age then restarting your body isn’t going to help much. It’ll still be terminally old and will probably stop again in next to no time.
And during the ‘down time’ cells are dying and brain damage will be setting in. People have been resuscitated over an hour after drowning, but a few minutes is usually all you get before it becomes pointless.
I’m much more intrigued by the idea of replacing the bits that have stopped working. Try this story about using printer technology to build new organs.
Or this oneabout growing new teeth.
Restarting a dead body without fixing it seems like a non-starter. Maintaining it properly and keeping it going indefinitely sounds like a distinct possibility. It’s quite amazing to think that by the time most of the people who read this forum need the technology it might actually be there. And if the need arises before the technology is perfected, well let’s not forget that the purpose of the research mentioned by the OP was to put people into suspended animation.
Oh look! Someone else is working on that too.