I suspect it's because of two side effects of more efficient communication. A) It is effectively painless to instantly check with me whether or not I am free a

I suspect it's because of two side effects of more efficient communication. A) It is effectively painless to instantly check with me whether or not I am free at any hour of any day with smartphones, so not doing so becomes less understandable B) I am in touch with many many more people over the internet even in my local area than I could ever hope to hang out with (or want to, as somewhat of an introvert workaholic) I like to be intentional and plan out my social activities with a calendar, ideally a few days in advance, but I also don't mind meeting up on short notice. But any amount of notice is necessary to even make sure I am home, much less wanting to be social. I actually feel smartphones have made me more active socially because instead of sitting around , we can plan things the day before while waiting for the bus, walking, etc.