My last surviving grandparent died several years ago. She was 93 years old. Her funeral was held in the chapel at the cemetery. Although the cemetery was huge and there were acres of graves available. But she was interred in a drawer, with a number on the door of it. Weirdest funeral I've ever been to. She bought the drawer many years before, when her husband died (I think what's left of his corpse is in a drawer in there somewhere, too). It's like an apartment building of drawers lining the walls of this very hushed, low-lighted hallway. There are many floors in the place, and there are hundreds of bodies in each one.
Anyway, most of her friends were long dead, so the only people at the funeral were my parents, my brothers, stepsister & stepbrother and our assorted children. The surviving relatives. We listened while the chaplain (who never had met her) said a few words about Grandma, put her in the drawer, and then went out to have lunch in a local bar.
Not long afterward, my dog died, and we had a very elaborate funeral. Around five or six friends came and also most of the neighbors & the neighborhood animals wandered over too. It's difficult to dig a grave here with a shovel b/c it's mostly rock, so people were taking turns digging. Then we put her in the grave, and we each put something in with her . . . I had a poem that I wrote for her, and a crystal; one of my friends had brought some feathers, my kids had written letters to her. I think everyone was crying. She was a really good dog. Grandma was a wonderful person as well, but I could never really get close to her because I couldn't understand a word she said. Didn't make me want to cry when she died.
As others wrote, when the deceased person is very old and had been declining for some time, the funeral feels less sad to me than if it were a younger person. I don't like it when young people die.