A high quality flash drive boots up instantly and loads apps instantly. I can't work on a 3" screen and don't want to carry around anything any bigger. So for me this is a better solution than a docking station for my phone.
Also, in the case of public computers, the risk of keyloggers means you cannot trust the computer even if you boot your own OS.
> risk of keyloggers means even if you boot your own OS.
While it's likely the OS of some of the machines I used were infected, the odds of them carrying firmware based backdoors was not a concern. The odds of getting dengue fever were far more likely than a hardware level hack. Those attacks are very hardware specific limiting the potential for widespread infection. At the time Snowden was still fresh on my mind. So I was more concerned with the NSA was sucking down all my emails / cloud data. There is only so much you can do.
Had I been using the OS on the cybercafes, I'm sure my risk of getting keylogged would have been 1000x more than using my own OS on their hardware.
How many of their users bring their own OS on a flash drive? In my travels, I only met only 1 other. One. He was running Tails. And as I said the chains with their management software and BIOS lockdown don't even allow this. So we're talking mom and pop cafes.
Now do you think those small time owners are going to spend their money to add this additional cost to spy on that one traveler who has his own OS? That make zero sense when they already control the OS and network. So much easier to spy on customers on that level. In that case, VPN + my own OS circumvents them.
Your paranoia only makes sense if I was going to DEF CON or some kind of a target of state level spying.