Hi all, I am planning on buying a new 15 inch MacBook Pro for my father. He won't be doing anything hardcore. Mostly writing documents, emails and watching videos. I am considering either the 2015 MacBook Pro for $2000 or the newest MacBook Pro available for $2400. I am a bit hesitant buying the older model since it hasn't been updated since 2015. Is the extra $400 worth buying the newer version? I am afraid that everything will switch over to thunderbolt 3 soon and buying the 2015 version is not worth it at this time.