[bzzzt]

Those laptops don't need to go to any landfill. They are much too precious to not recycle the metals and other materials and will be taken care of if you return them to the manufacturer. (by law, at least in the EU)

[dml2135]

Still, reuse > recycling

[coldtea]

Recycling the metals is obviously far less useful than being able to still operate them even if Apple stops macOS updates for them!