Sony has the benifit of having a really huge following outside of Japan, although the switch has a pretty big following as well I think it's still mainly the biggest in Japan, the fact you can carry it around I think helps since I would imagine most that travel a lot may have one, I can picture more buisness traveller's having a switch over there than I can in any other country
But I do agree that the xbox is pretty bulky, the ps5 is huge as well, neither are able for travelling, the only thing saving xbox the now is the game pass where you can pick up where you left off on a phone, tablet or laptop etc, I believe PlayStation are going be starting their own version soon which honestly if they didn't I could see it falling behind both xbox an the switch, they will need to offer just as good a library for it to be a huge success, if they do the same as xbox where it can be played anywhere I can really see it being a huge battle between the 3 for new customers