Hi, really appreciate your response, and that's exactly what I am thinking.
I used to purchase lightening to 3.5 mm adaptor for my iphone. However, they suddenly told me that they don't produce it anymore sometime last November. People on the internet said that's because new iphones are using Type-C.
I guess this will be the case for magsafe2 charger as well. New macbook pro/air are using magsafe 3, so apple will stop producing magsafe2 chargers soon probably.
This is a big problem for me haha, because although my mac is 7+ years old, it still have 200/500 GB left with all functions normal. So I need to use it for another 7-10 years probably. If so, I may need to buy two chargers instead of one.