No, its very stable. The Q ROMs are not usable as a daily driver for me.
Thanks. Yes the bugs in Q were a deal breaker. My father is currently using it. On AEX 4.7. But Pie and later just feel much smoother (although RAM usage is quite a bit higher as well) last time I had tried. Maybe a factory reset is needed(~15 months since I flashed AEX) but I didn't think SD650 would prove to be laggy in general usage. Hence thinking about flashing any Pie ROM.