In the charging setup screen in the ID.4 it specifically cites that VW recommends a maximum of 80%. Not sure if the ID.3 has a similar listing.
Li-ion batteries in general are availed of 40%-80% usage range for best longevity. However [in the USA] our ID.4 main battery is warrantied for 8 years (at no less than 70% capacity) so not really a concern.
Li-ion batteries in general are availed of 40%-80% usage range for best longevity. However [in the USA] our ID.4 main battery is warrantied for 8 years (at no less than 70% capacity) so not really a concern.