I tried things like character AI to play with talking to "celebrities". It was novel, it was fun. For about 15 minutes. Then... Eh. It's not the person, and your brain knows it's not them. It's always an imitation. I got bored talking with people I've always wanted to talk to.
I can't imagine it being a lived one who has passed. It would feel hollow, empty, and wouldn't make the pain leave. Idk, it just wouldn't be good at all