Indeed, analog circuits are much more process sensitive (while digital circuits are defect sensitive), which makes their design slower and much more closely cou

Indeed, analog circuits are much more process sensitive (while digital circuits are defect sensitive), which makes their design slower and much more closely coupled to the specific process node that is being targeted. This is why now a days bleeding edge process nodes might be lacking in IO (especially fast serial IO) when they're first released. Additionally, analog just hasn't scaled for quite a while now. Even traditionally analog circuits like PLL's and IO are getting more and more digital as the digital scaling is making more digital architectures competitive in space and power when they weren't before.