For
It ensures safety and better performance.
Against
It creates waste and forces people to buy more.
Anonymous excerpts, translated where noted.
“Smartphones couldn't be flat, light, waterproof and dustproof at the same time if they were designed so that every user could simply screw them on”
“require relatively complex onboard power management units that moderate charge/discharge for safety.”
“That means higher repair costs, more e-waste, shorter product lifespans, and more pressure to replace devices instead of fixing them.”
“the manufacturer doesn't sell spare parts, so I found it impossible to find a replacement.”