Cleans and keeps the solder points clean. Prevents oxygen from reaching the solder joint

Try searching for hall effect Controllers. They will be more expensive, but don't need sliding surfaces or easily failing parts.

I go by: If you are not sure you need a good one, buy the first one for cheap. Of you break it, buy a quality one. You obviously need it.

You could also ise a library. The ones I have used are free or almost free

Yes, I can understand both views. It is simply a difference in culture, I guess...

I would say ~10 years is normal for a murder in Germany and other European countries. I don't know about current Russia but here the idea is jail time should lead to rehabilitation and a bit of punishment. In the US it is much more focused on punishment.

You can disable it in the menu that opens when you click on the button at the right of the address bar

In Germany underage drinking is at 13-14 and also happens a lot

As an ethnic russian living in Germany this was exactly the way I felt. But afaik this sadly does not reflect the general russian population. I think people have always less problems to accept more lies than to accept that they have been fooled.

Everything is a trade-off ;-)

Spare parts don't run on 5-10 watts.

Brother ist the way to go. Also OK for Linux in my experience