Earlier quoted context omitted.
Maybe with the upcoming IP address certificates, we can use IP addresses again. I remember using IP addresses to access some sites in the past. https://news.ycombinator.com/item?id=44379034
Evenn though its onelayer down - the same tactics that were used to suspend/takeover domains would still apply , at the end of the day one still has to get the IPv4/IPv6 address from someone(who can be coerced).
Alternatively they pressure USA ISPs to block the addresses. That's already regularly done but it probably won't be enough to satisfy the extortion industrial complex which is out for blood.