WTH is Climate device type support (e.i. thermostats) still listed as ”beta” in the ZHA integration?

Why does the Zigbee Home Automation (ZHA) integration still lists support for Climate device type as “beta”?

https://www.home-assistant.io/integrations/zha

Climate (e.i. thermostats) for ZHA was initially added/merged to Home Assistant core in May of 2020 so should it not been proven mature/stable enough now? Are there any functions or features missing from it?

https://github.com/home-assistant/core/pull/35682

I think this is very much related to the recent blog post saving energy as Climate support is what is needed for controlling Zigbee thermostats like TRV.