I read that defector provided soviet jets at one point had tiny weeny valves, which were not indications of how backward their electrical engineering was: they were capable of being rad-hardened more than the IC's of the time. I'm not sure this is true.
Viktor Belenko's defection to Japan w/ a MiG-25 is a fascinating story unto itself. But, yes, the MiG-25 had vacuum tubes and other design elements that seemed like anachronisms @ first glance.
The use of vacuum tubes also made the aircraft's systems resistant to an electromagnetic pulse, for example after a nuclear blast. They were also presumably used to provide radiation hardening for the avionics.
Contemporary application: A Texas businessman convicted of plotting to violate the U.S. Neutrality Act in a failed 2014 bid to overthrow the government of Gambia and install himself as president of the tiny African nation was sentenced on Thursday to a year in prison.
Sounds like new and existing accounts, but only if the email originates within AWS EC2:
When you call Amazon SES from an application hosted in Amazon EC2, you can send 62,000 messages per month at no charge. This Free Usage Tier benefit does not expire.
I decided early on to edit the menus to remove a lot of the "junk" and replace it with my list of apps, so I fired up the Main Menu Editor app. Normally this is quite responsive, but on the resource-challenged Zero it had worrying lags and pauses as changes were made. Ultimately, it meant that my ad-hoc menus were corrupted and worse still, the default Pi menus had been reinstated.
If I understand Raspian’s portability correctly, this could be mitigated by preparing the system disk on a Pi w/ more resources, e.g. a Pi3– run Main Menu Editor w/ system disk in Pi3, then put system disk in Pi Zero W when menus are edited to satisfaction.