the i4 is more expensive than tesla 3, perhaps, because, they haven't got a dedicated platform, which may inhibit i4 sales, no estate variant either;
so Audi A4 and even Jag might be prudent to wait until they can see i4 sales, demand for saloons, before leap-frogging in with a dedicated (& better priced) platform.
Do we know if the electric A6 will really be a saloon or, does it have height of a cross-over.
Whether better battery density too, will open up better optimised saloon platform designs, not currently available.
Or it’s more like they don’t want to compete directly with the Model 3, everyone compared everything with a Tesla at the end of the day.
They’ve built a more premium car and priced it accordingly and Audi just haven’t bothered.
There is more money in crossovers/SUVs anyway so they may well just be happy to give up market share in that segment at the moment while concentrating on more profitable segments.