Yes. And I've never once run into issues with redundancy of information being a problem. It's the clever things people do to hide information or to be concise that reliably get them confused.
> The closer you can get to the whole UI being a single sentence and two buttons the better.
Sure, but this is kind of my point—clever UX tricks to communicate things without words don't work for them. A toast is valuable for the tech-illiterate precisely because it uses English text to communicate its point, and having it exist in the same spot for every action makes it easier for them to pick up.
It's not the be-all end-all of UX design for the elderly, but it's a heck of a lot better than the alternatives proposed in TFA.
Things disappearing with insufficient explicit feedback for what actually happened to the things is one of the most common issues I've encountered with older computer users. I think it's the most common issue. Toasts add persistency and visibility for users who barely or don't understand the UIs they're interacting with, which makes it easier to understand what happened.
If Outlook gave feedback to every user action in a toast, then provided a universal history of every toast, you would probably resolve a significant amount of issues caused by user actions leading to unintended changes (and being unable to recognize that the action lead to a particular change, or even how the current state differs from the previous one).
The whole point is that they DON'T add visbility, because they're not presented where the user is working. Age isn't even a factor.
It's time to stop blaming "age" when the more likely explanation is EXPERIENCE. Many people learned to use computers in an age of well-understood GUIs that hewed to standards that evolved for very good reasons. For example, buttons that were depicted (in a clean, not cheesy "skeuomorphic") manner. You can tell at a glance if a well-depicted button is on, off, or disabled.
Then enter the idiotic "flat" design fad, where the entire screen was an Advent calendar of no controls at all... or is it ALL controls? Click on every piece of text and every rectangle to look for the hidden goodies.
Those conversant in (and tolerant of) more-recent UI have simply become accustomed to shitty UI. They've either forgotten how bad it is, or grew up not having experienced good design. Another great example that has disappeared in many areas is GREYING STUFF OUT. If something is not currently usable because it's not applicable, you don't just make it disappear. You grey it out, so users can learn
1. That the function exists
2. Where the function resides
3. What conditions must be satisfied to make it work
The given examples seem pretty poor. An email disappearing from a list doesn’t tell me it was archived. Maybe it was deleted, maybe I accidentally hit some button and I’m not sure what happened.
This discussion tells me we have not yet reached perfection in UI! Toasts are good for me, but definitely not good for the users you and others have described.
My hope is that small AIs inside UX can help here. Can you tell your UI framework something like, "Give them a choice between X and Y." and then "Clearly indicate they have chosen Y." (with a fallback of "Tell them something went wrong, and they won't be able to make a choice right now after all.")
Or is it simpler than that, and we don't micro-manage the AI-powered UI engine? "Get answers to these questions, and submit them to this API." — and UI engine does all the rest? I'm not sure.
Anyway, an improved UI would adapt to the user — think of the way a person providing a service adapts to the customer, intelligently and empathetically. For example a teacher watching for signs of understanding in a student, adjusting explanations. A car salesperson being quick and businesslike with one customer and listening patiently to another.
Redundancy in UX confuses them. The closer you can get to the whole UI being a single sentence and two buttons the better.