I would say several SIM cards and large storage drives probably isn't part of everyone's going-around-town bag. The rest doesn't seem TOO out-of-the-ordinary.
For me, someone who occasionally carries two laptops (bulky company-issue, light personal worktop) and a sundry of perboard assemblies that would make the TSA raise an eyebrow. But I think even that might count as 'unusual' if you're talking about the average population. How many peoples' jobs require them to occasionally have 24/7 access to their work computer? How many people carry around devices solely because they vaguely intend to tinker with them at some point, and you never know when you'll have a spare hour?
Probably less than 10%. Also, side-note, as much as I hate the TSA's security theater, I've never actually had problems with bringing things that look like bombs through security. Including a wired belt with a black box covered in electrical tape (compass)...good thing I'm white!