I haven't seen a plug with screws in ages. They all are a single molded piece now, aren't they?
See: https://www.kulthifi.de/WebRoot/Store19/Shops/80012341/5E84/... for example.
Turns out it's much easier to fix the plug than fix people.
But you can - if you're so inclined - buy plugs with screws and replace the molded ones by cutting the cable.
And that's my point - in my granddads time, all devices came with plugs that could be repaired and re-used (and my granddad never threw them away) - and today, all devices come with plugs that can only be cut off and thrown away.
I fully believe that the molded ones are actually both cheaper AND more durable (will last longer without needing repair). But they are neither repairable nor reusable, and thus still end up in a landfill sooner than the old ones, when those old ones do get repaired and reused.
And the same is true for most other components of any device.