The current CCS charging infrastructure is not just an ID.4 problem. It’s a problem for all EVs, including Rivian and Lucid. However, Lucid is able to compensate for the scarce CCS charging infrastructure with a phenomenal range, so it can basically last through an entire day of driving (say 7 hours at 75 mph) on one charge. At this long a range, the scarcity of the CCS charging infrastructure plays a very small role, and the only real dependency on the CCS charging infrastructure is its availability, which is currently not great either.
With the ID.4, there are two other deficiencies vis-a-vis it’s charging: low speed of charging and short range at highway speeds. These three factors: scarcity / low availability of CCS charging infrastructure, slow charging rate, and short highway-speed range make it a time-inefficient vehicle for road trips. However, when used as an in-town vehicle, these deficiencies no longer matter, so then you start looking at other qualities of the ID.4, such as build quality, ride quality, etc. Those are definitely superior in the ID.4 over the Model Y. Then, there is software: the ID.4 software is bad and has not yet been OTA upgraded (at least in North America). The Tesla software is industry leading, and the updates come on average once a month (sometimes as often as twice a month), including both bug fixes and new features. However, the Model Y has no CarPlay or Android Auto integration, while the ID.4 has both (including their wireless versions). So, if one must have CarPlay or Android Auto, then the choice is the ID.4.
My opinion after owning both for six months concurrently, use the ID.4 as the primary around-town vehicle and secondary road-trip vehicle. Use the Model Y as the primary road-trip vehicle and a secondary around-town vehicle.