That's why one uses an industry standard that is brand-independent,operates offline by design and does not require a central component besides a power supply.
Sounds like utopia?
This standard has been available since 1990 in its archaic form, since 2002 in its current form.
It is downwards compatible and over 400 companies worldwide are part of the standard.
HomeAssistant, ioBroker, openHAB,etc. all support it directly and there are multiple crossover gateways with other standards like DMX, ModBus, Dali,etc. exist.
And no, it's components are not more expensive once you look at the TCO.
For fucks sake, people, use KNX.
(PS: There are even a few open-source/DIY components available)