Fantasy/SciFi book, read in the 90s/00s, possibly "garden" in the title. Immortal people change bodies whenever they want, maybe ultimately want to die?

[Essie]

Read in 1990s, early 2000's. The characters are super self-indulgent, immortal beings who can change bodies, are ultimately really bored, and I think it starts to explore suicide and death?

[SBC]

Maybe Biting the Sun by Tanith Lee?

[Bargle]

Link Biting the Sun by Tanith Lee.

[Mir]

I think originally published earlier, but maybe An Alien Heat. It's set in the far future and only a few people are left; they control everything with their minds, and can change their bodies, no need to work at anything.