After how many years to buy a new laptop for security?

It can be that he breaks down every day.

This can happen even after 6 months or earlier.

But I'm talking about the normal case and not of absolutely extreme exceptions.

There's no rule for it.

I do it like this:

If it is no longer enough, then I will get a new, which is "normally" every 2-3 years… Prices are in my books at 300-400 euro… The old I will normally go for about 150 euro (at very good Maintenance ).