I'm curious what people think about this as I'm torn.
I met a friend, B, through my best friend, M, eight years ago. M and B were very close friends at that time (I'm due to be M's maid of honor, but it likely would've been B if the two of them had stayed close).
Over the years, B and I became close friends as we lived in Italy, near each other, while M lived in the UK. I now live back in UK closer to M.
Essentially, M and B have lost touch because neither of them are on the same social media platforms. As B now lives in a far away country, we keep in touch mainly by WhatsApp and Instagram where she runs much of her art business. M, despite being younger than me, seemingly lives in the dark ages and has a Nokia and no smart phone. We talk via text/phone and Facebook, which B deleted long ago.
This means that whenever B visits, I have to coordinate the whole thing because they can't communicate. I find it absolutely ludicrous and think that for the 1 or 2 times a year that we're together, one of them should suck it up and get on social media.
YABU - it's up to them if they lose touch
YANBU - they should make an effort