If you want to design and make your own 5nm high-end system-on-chip, Marvell's offering ASIC-as-a-service

Yes, it's going to cost a bob or two, but the option's there

Marvell will today formally open the doors of its bespoke tailor shop, though rather than cutting and sewing cloth, it's crafting custom 5nm semiconductors.…

via The Register - Data Centre: Networks
https://go.theregister.com/feed/www.theregister.com/2020/07/23/marvell_custom_asics/