Cemeteries are a waste of space and resources.
There’s a deep human need to engage in death-related rituals, and burial is one that’s been around for a very very long time. I do not expect to end the use of burial.
I really like the idea of memorial forests much better. for instance:
https://www.thelivingurn.com/pages/memory-forest
I’m to be buried naturally with no casket or embalming. Great for wildlife. It’s like putting a fish head in the hole when you plant corn. Except, you know, a 200lb guy.