Conventional jet engines run at RPMs in excess of 20000rpm. To get this same speeds for the same mass flown rates of say a J79 (F4-Phantom) you'd be looking at some massive electric motors. Conventional jet engines would be using electric motors if they were light enough already.
There is a reason Rolls-Royce UltraFan uses a speed reducing gearbox for it's fan blades and not an electric motor.
More to the point above, at hypersonic speeds, using a conventional compressor is sort or useless unless you can keep your air cool.
AFAIK ITAR applies to US Persons so that would be how the US is able to enforce that worldwide. A better example would be all the KYC and other laws surrounding the use of US currency.
I highly recommend AccuBattery for Android. I have been using it for a few years now and I saw a noticeable difference on my Pixel 3a XL compared to use on previous smart phones. I now have a Pixel 6 and its nearly 2-years old and the battery lasts well beyond 30-hrs with combined use.
My previous phone was an iPhone XS and its battery was also completely fine for 2 years. Year 5, I definitely noticed a drop in battery life. If you're planning on keeping your phone for 5+ years, definitely do the 80% thing. If you're on a 2 year upgrade cycle, it probably doesn't matter.
