There's a lot of good heritage breeds out there. I'm hoping my hamburgs will be that for me. Good layers but not production level, and smaller eggs so easier on the hens.I've done some more digging into figuring out why I lost my chicken this morning and found an article that could explain how a shell membrane could end up inside the body cavity.
https://www.msdvetmanual.com/poultry/disorders-of-the-reproductive-system/internal-layer-in-poultry
If I understand correctly the egg could move backwards and go into the body cavity. I feel sorry for the poor girl, but I blame the breeders for pushing the limits on egg production. The next chickens I get will be true heritage breed birds that lay fewer eggs.
Here's the article, quoted, with relevant parts highlighted in red.
My landrace dwarfs might end up my forever breed. They'd be excellent layers if only they didn't go broody all the time

The dwarfs are crazy broodys and the hamburgs aren't supposed to go broody. I'm not sure which breed I'll settle on, but broody tendencies might matter to you too down the road.