If you intend to run Home Assistant, you do need more RAM/CPU, but not for deCONZ alone. I’ve been using Home Assistant instead of Homey for a while now, very happy with it. It has a bigger learning curve, but it supports more features and more complex automations. It’s also much more open than Homey, so there are actual log files you can look at in case things go wrong. Plus custom dashboard.
You can look/ask around in the deCONZ thread to find out how much of your devices are supported. I think that if deCONZ itself supports the device, including advanced features, the deCONZ app for Homey will also support it.
