Manufacturers are dependent on automotive qualified parts to be available. For reference, a moderate to high end solution might use the Arm a53 cores from 2012, with an A72 if you're lucky. Usually even that gets pushback from beancounters and the fallback will be some chip from TI that makes the z80 in their calculators look almost modern. Couple this with software that has had 0 time allocated to optimization and you can see the issue.
A lot of manufacturers are exploring custom silicon instead, because that's a great way to avoid spending money.
A lot of manufacturers are exploring custom silicon instead, because that's a great way to avoid spending money.