I currently have a 2009 MacBook Pro which due to its age cannot update the operating system and so restricts what I can do. I'm therefore looking to purchase a more recent Mac (Air this time). I'm a relatively "low end" user (no photo/video/audio editing or gaming). Will waiting for the M4 version of the Mac Air improve future proofing beyond that provided by the M3 and would a "Pro" or "Max" version of M3 or M4 make a difference worth having?