Sorry, that is a misinformed view. Your proposal has exactly the same problem IPv6 has - all network hardware knows the format of an IPv4 header, and you can’t fit larger addresses in it without changing all network hardware and software. So large swathes of the internet would be inaccessible until all those routers, firewalls, middle boxes, cell towers, etc. are replaced, which would take another 20 years! Whereas it’s mostly been done for IPv6.