Yes, that article states that as well under limitations: "Deprecation status: While functional, Apple discourages its direct use in favor of App Sandbox for developers."
Good information, but you can already turn this off via the (quite hidden, I admit) setting that is mentioned in the article. That's a better way to turn this off completely, rather than patch it via a visual rule.
That does not completely turn off the federated sign-in popup you see on the top right in various websites. The solution is actually already mentioned in the article.
For NYC specifically I've been burned many times by Citymapper. It is trying to be clever and parse the messages about service changes, but does it all wrong and in the end gives you wrong directions, leaving you stranded. Sometimes it doesn't show the alerts by MTA at all.
Now that the MTA app is so good and has achieved feature parity with Citymapper, I prefer that for 90% of the time. It doesn't have multi-modal (eg subway + citibike) and doesn't show estimates of uber/lyft prices, but those have not been very useful in my experience.
Citymapper is still ok to quickly check upcoming train or bus departures.
Pretty cool. If you have adguard home and google assistant, you have access to a switch that can enable/disable adguard home protection. So with the homeassistant app you can add that as a quick tile as well. The only caveat is that this will disable it across all devices.