I’m biased (I haven’t used ZHA in 4+ years), but I find it super helpful to have my Zigbee network separated from HA (doesn’t restart when HA does, faster / easier / better compatibility) and the UI is a lot easier to work with especially with handling grouping and binding.
It is a little annoying to migrate since you have to pair all of your devices one at a time to Zigbee2MQTT, but I think it’s worth it.