Diagnosed with ADHD, so I'm guessing an ND folk here: modern applications in general, and webshit in particular, give me huge anxiety because of all the eventual consistency and optimistic actions bullshit[0], coupled with flakiness and bloat of entire modern software stacks[1]. Maybe "toasts" aren't the bee's knees, but they work as lagging indicator that something happened that I otherwise wouldn't notice, and in some apps even lets me undo the unwanted operation. That does a lot to relieve my anxiety and help me use software with less frustration.

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[0] - That itself is a big antipattern. Software lying to user about its state is a form of gaslighting; it makes interaction more error-prone, and prevents users from building correct mental models of the application and its interactions with other systems.

[1] - My Android flagship lags often enough on taps and drags that every other day my input gets misinterpreted and does something unwanted. Similarly, I type faster than most software - webshit in particular - can react, so e.g. a small jitter can turn "ctrl+t n e w s <ret>" into "ctrl" (held, released) and then "n e w s <ret>", which does $deity knows what in the current tab.