"stable" will depend on what your uses are. 2.0.0 was improved by 2.0.1 but the latest 2.0.3 firmware works fine, has auto-resolution and is very stable for my own needs (i.e High bitrate 1080p Blu-ray quality playback from HDD USB attached and NAS over network with full 7.1 audio passthrough using the included wrapper).
Streaming from the web and 2160p video with HDR is a whole other matter...... (and not my usage).
Upgrade and see for yourself?
The Custom Firmware has some further fixes that will be included in the next 2.0.4 firmware, whenever that turns up.
Q10Pro + 4Tb HDD, Firmware 2.0.3 Kodi 17.3