Implementation time? AI is a huge win, at least in the small. For a multi-year project, I'm not sure yet. (It is, literally, too soon to tell.)
But for new developer onboarding and team maintenance, I'm not sure whether AI is more of a handicap. Yeah, AI can digest a huge mass of code and give you a summary. It can also create a more indigestible mass of code. Is it reducing that cost, or increasing it? (Again, too soon to tell.)
As noted by sublinear elsethread, surprised that JavaScript didn't get more discussion (though quite interested to read the 189 page PDF: https://www.wirfs-brock.com/allen/jshopl.pdf ), and also surprised that Domain Specific Languages and specialty tools/environments such as Processing didn't come up since they seem one of the obvious end-games of this premise.
Web apps carry the weight of ecommerce, entertainment, social media, etc. The fact that those apps are frequently at the center of political debate and pop culture underscores their broader success far beyond the discussions that only developers understand.
Along with the HTML and CSS, the code written for the corporate web is not up to the developers alone. You can't ship anything until it's been through far more review by non-technical stakeholders than the devs using other languages may get away with. Yes the quality can vary, but when it's bad it reveals the dysfunction of the organization in a very public way. There's so much cross-discipline human involvement that the developers are in roles that resemble a bureaucrat more than a programmer.