What is healthier for the laptop?

I have a laptop and often play on what would be "healthier"

Always leave it at the socket
Charge it (100%), empty it (15%) and so in alternation it is new and has not got used to anything

It depends on how old he is. The new batteries don't care anymore.

There's no clear answer. Because there are laptops that charge the battery at the socket and then live directly from the charger, and there are laptops in which the current always runs through the battery. For solution 1, leaving it at the socket is the better solution. For solution 2, full charge cycles would be better.

However, high-quality devices tend to belong to group 1.

What, then I ask you why MacBooks still count charge cycles today?

First use the battery, then recharge, I would say. But only really charge when you really need to.

The best thing for the battery is probably to take it out and then work with a cable, without a battery.

By the way, your battery feels most comfortable between 30-70%.

The battery on my laptop broke at some point. I then simply operated the laptop without a battery on the cable, so the battery can logically no longer be damaged.

Exactly, worry about that and don't buy the dirt.