Dreaming up an Obsolecence scale between 'we intentionally want to make our customers buy new things bc profit' to 'yeah so we don't do that any more because that would be intentionally giving kids cancer'
Planned Obsolecence: This thing could last ten years or more but then no one would buy a new product from us for ten years, which will eat into our profits. Luckily we can make our product incrementally worse to force people to buy new ones before that ten years is up.
Scheduled Obsolecence: As less and less people use this old method, it becomes more prohibitively expensive to keep supporting those few people, and resources are better spent on trying to help them transition to the newer, cheaper technology - as a result we will completely stop supporting the old method in a few years.
Regular Obsolecence: No one beside a few weirdo hobbiest would use the old method because we've just developed affordable, more effective technology to achieve the same thing. There's a reason no one sends a telegram any more.
What the Fuck Obsolecence: Yeah so no we don't do the Coca Cola with cocaine in it any more for the same reason we stopped treating headaches with leeches and arsenic.