It seems like different public relays are being attacked at varying times. For example, there was a heavy attack on Damus, then it stopped for a while, only to return later. The same thing happened with oxtr, "wiz.biz", and a few other relays.

What I’ve been doing is disabling and then re-enabling downloads from the public relays under attack (while still writing to them so that people can read my messages).

It’s a bit chaotic. And IMO, most of the proposed solutions have had worse consequences than the spam itself. For instance, since some folks are "protecting  themselves" (i.e., hiding) exclusively behind WoT relays which I don’t have access to, I'm never sure if they’re even receiving my messages. Similarly, preventing folks without NIP-05 addresses from writing to a relay is even more damaging to new users than the WoT issue. Finally, it seems like the attackers are already PoW-capable, which means the PoW relays are just adding complexity for legitimate users.

As a user, what I’d like is a quick way to toggle between only viewing posts and replies from "connections of connections" to viewing posts from everyone on Nostr.

Apparently, Damus offers this feature. Do you know of any Android or web (but mobile-friendly) clients doing something similar?