Like I said, my concern isn't around them finding someone else. According to their knowledge Mc is dead, gone, dissolved, snapped from existence. I don't see them "waiting" for MC. Yua maybe, but I feel most would grieve and move on from his death within those ten years.
Like I could obviously be wrong, I am not the one writing this nor do I have an insight into what the dev is planning, I just doubt the MC will come back and things will pick up where they left off. Which means, getting to know a lot of the characters again, seeing how they changed over the 10 years (at least the younger ones) and brushing up on current events and what happened after. It just feels like a reset for the world building and character growth. Like we spent the first 2 chapters learning about the world and whatnot and now we are going to have to do it again. Which isn't necessarily bad but I feel like it will take an entire update to get us up to date and that's like a years time for AVNs.
This is just my concern though. I mean when I went to my ten year high school reunion, a lot of people changed quite a bit lol so it is weird to jump 10 years and not expect characters that I liked will have changed, or moved on, or whatever. I get that they will more than likely won't, I understand ppls reasoning. But its like my left and right sides of my brain have two thoughts about it. One is trying to suspend disbelief and the other is trying to be all logical.
All I can do is wait and see, which I am, but I will still comment on it.