It depends on how things work, of course, but the danger is that he will be stuck in an incorporeal form on Earth forever. When canon!Voldemort is flitting about in Books 1–4, possessing Quirrel’s head, drinking unicorn blood, a little baby cuddled in Wormtail’s arms, it’s not clear that he’s in a form that can be killed at all, but it’s not a form that he appreciates either. So it may be that the only way to sail the stars on Pioneer is to get a body to be killed in (and I don’t know whether MoR!Quirrel’s will do or he needs to be resurrected as at the end of canon Book 4) AND have no closer Horcruxes to reappear near.
But if he has things under good control, then you are right. He can have fun on Earth, using his terrestrial Horcruxes at need, then only go to Pioneer at the end, when life on Earth loses its charm (or when his plans on Earth are complete). As long as he knows that he can create the conditions for resurrection on Pioneer when he wants them, then you are right.
I fail to see how life in deep space + life on earth < life in deep space, especially considering that V. is super against dying.
It depends on how things work, of course, but the danger is that he will be stuck in an incorporeal form on Earth forever. When canon!Voldemort is flitting about in Books 1–4, possessing Quirrel’s head, drinking unicorn blood, a little baby cuddled in Wormtail’s arms, it’s not clear that he’s in a form that can be killed at all, but it’s not a form that he appreciates either. So it may be that the only way to sail the stars on Pioneer is to get a body to be killed in (and I don’t know whether MoR!Quirrel’s will do or he needs to be resurrected as at the end of canon Book 4) AND have no closer Horcruxes to reappear near.
But if he has things under good control, then you are right. He can have fun on Earth, using his terrestrial Horcruxes at need, then only go to Pioneer at the end, when life on Earth loses its charm (or when his plans on Earth are complete). As long as he knows that he can create the conditions for resurrection on Pioneer when he wants them, then you are right.