to me this unsurprising. we have decades of evidence showing full recovery from years of sinking at various stages of life. Obviously regeneration is present
The question isn’t whether or not regeneration is a thing (cell themselves die and spawn a new), but how, where, why… all the actual details of a complete understanding.
And even with regeneration what’s the price paid in telomere shortening? Granted I’d rather regenerate and live healthy at the cost of a few years of extra life with barely usable lungs.