Is the Raspberry Pi Compute Module 4 supported?

With the CM3 we have long term experience and some of our early prototypes have been working for years without failures.
The additional CPU power and large RAM memory to the detriment of power consumption are, in our experience, not necessary for use as a pure smart home system. (For other tasks like network storage, Nextcloud, virtualization, however, they are…).

In the long term, a version/upgrade with CM4S support is planned.
The module interface will definitely remain compatible to allow an easy upgrade.