worthless promise, 2030 is too far away for any accurate prediction.
Considering the long lead times in the auto industry (~5 year development cycle), 2030 is not that far off; the 2030 model year is effectively only 8 years away and less than 2 full development cycles. The vehicles scheduled to come out in 2024 and later are on the drawing boards now, and vehicles scheduled for 2030 and later are certainly in the early planning stages now.
And with more and more countries announcing bans of internal combustion engined vehicles starting in the early 2030s timeframe, it does not come as a surprise to me what Audi has announced.
Stopping development of new internal combustion engines is getting increasingly common but ones that are now in use will probably still be improved to the planned end of their life cycles.