Let's Talk About Plantsims. Why they are not Still an Occult in TS4?

Plantsims has been my favourite lifestate, ever since they were introduced in The Sims 2 Seasons. They were also the only reason I got University Life for sims 3.
It's sad if they won't ever become a real lifestate in sims 4. I've never even bothered to make one in sims 4 since they're so poorly made...