Note taking in lectures

Can't comment on Physics but I hand wrote notes, placing emphasis on getting down the details not mentioned in the slides. It's easy to go back and look over the PowerPoint again, it's far more difficult to remember arbitrary statements that were spoken by the lecturer. After a lecture I'd write more thorough notes, combining the information from the PowerPoint, the notes I'd made and additional research where required.

Despite being on a very technology oriented degree, I never used any digital medium for note taking. A number of students produced typed notes, although research suggests this is not as effective as hand written notes. Some people would hand write on a tablet, or type on their phone but this wasn't common. What was common though was people with digital devices getting distracted by them and paying less attention. It's also a lot more difficult to ignore accumulating paper, vs digital notes that you can save in a folder and never look at again.

With regards to 2 in 1 laptops, finding ones that are suitable for handwritten notes can be a little finicky. Many laptops can feel quite cumbersome in tablet mode, due to the increased size, weight and general bulk of a laptop. You also need to make sure you get a pen, which may be included or may be an extra purchase. 2 in 1 devices tend to be more expensive, so it's worth finding out if you'll benefit from one before pulling the trigger.

Of course what other people do shouldn't really impact you. It's up to you to find a system that works for you, be it physical or digital, handwritten or typed.