With proper configuration, in your case -- to get home network working, you don't actually need anything, any solo image is enough.
Just put management interface on untagged VLAN, and client traffic on different, tagged VLAN (or VLANs, if you need more separated networks).
All latest vulnerabilities related to cracking WiFi access are not that important for home use -- actually I have never read about real case of they practical use. Most WiFi networks are vulnerable because use bad passwords. So if you use proper setup, and don't have freely available very valuable info in your internal network, you don't need to be much troubled.
Speaking about performance and connection stability - you'll get very good connections from R730, of cause.
I agree, that it was unfortunate that because of need of early release, died-end chipset was used -- chipset, which lacks some hardware features, needed to achieve WiFi6 compliance. I suppose, when development was started, it was not clear, that chipset will not have this features.
So as soon as new chipset version became available, R730s model was dropped and replaced with wifi6 compliant, and we can't expect any new development for it (except continued support for platforms, on which it was integrated already).
We have installed a few R730 (under vSZ management) and they still work very nice, even so there were some functional limitations in the beginning (such as no support for mesh, for example).
We provided once Internet access during some EU event for family doctors , which had ~400 users, sitting in raws in area with just 1x R730, and obviously interest for presentation was so exclusive, that everybody was browsing Internet during it - we got ~500 devices connected and they together maxed Internet connection at 600Mbps (optical).
You can add ZD1200 as a controller, if you want more manageability and monitoring, but for home use you don't really need this...
