I know my parents would love that option now that they've edged far east in the San Gabriel Valley and almost into the Inland Empire.
Getting to LAX has become more and more of a pain for them each time they fly.
I imagine CI would give up some connecting traffic (if much at all) but what else would they lose? It would interesting to understand the base of travelers on the LAX-TPE route - it's up to what, 4-6 frequencies per day between BR & CI? How much connecting traffic versus O&D traffic? How much business versus leisure?
ONT is a lot easier to navigate than LAX and closer to the SGV where a good proportion of the Chinese/Taiwanese community is based.