One of the gents in the cottage where I work (residential/teaching facility for adults with develop/mental disabilities) has no teeth, either.
All his meals come up ground or pureed, depending on the food. Sometimes the food doesn't look too good, but sometimes it is ok. Doesn't make a bit of difference to the taste and to see "J" scarf it down and ask for seconds....
, you get the idea.
There is another guy that gets Ensure pudding...
Of course, your neighbor has the years of being able to eat non-ground/pureed foods to deal with.
And, once his gums toughen up a little bit there will be relatively fewer foods that need to be modified. I'd imagine apples would still need to be mashed, but a good set of gums can still mash up a bit o steak.
Good on you, Dawn, for helping out your neighbor.