[timonoko]

The horror that was aluminium engine. You could open and close a screw only twice and goodbye threads.

[derefr]

The trade-off being (I'm guessing) that those threads would be pretty easy to re-tap by hand?

[dnemmers]

I think the usual move once threads are gone, is to move to a steel threaded insert (helicoil, time-sert, etc)

https://www.mcmaster.com/products/thread-repair-inserts/thre...

[convolvatron]

or go up a diameter if that's feasible.