Personally, I think the four corners will be better, otherwise it will not replace the triangle so soon. In the past, triangles were used to save cloth, but now almost no one pays attention to this. It doesn't matter how much cloth you use, as long as it is comfortable to wear.
Many people report that briefs are annoying to wear, especially those bought in small sizes, and feel that they can't be worn at all, because they feel particularly pricked. Walking will be awkward. It is very painful to rub back and forth between the sides of deltoid muscle and the meat on the inner thigh. In order to avoid this problem, many underwear are now developing towards four corners. Anyway, this kind of clothes worn inside can't be seen by others, no matter the triangle or the four corners. The most important thing is that it is comfortable to wear.
When purchasing, just pay attention to choosing fabrics that are soft and not tight, and it is best to raise the price if possible. After all, it is the clothes you wear inside, which is still very important.
And from the perspective of shielding, boxers are more conservative to wear, after all, there are more places to shield. Some people are not used to wearing pajamas at home. Boxer pants can completely replace pajamas, but they are somewhat exposed when they are replaced by triangles, and there is no more comfortable feeling when they are worn out.
However, what kind of underwear to choose in life depends on personal habits. It's just that I personally prefer the four corners. There are no rules, and there is no need to specify what style to wear. As long as you feel suitable for yourself and dress comfortably, it's your own business to dress like this. It's none of your business. I'm just making a personal suggestion.