Yeah, Programmable Power Supply mode can be programmed (in realtime) to deliver from 3.3 to 21 volts in 20mV steps. For current im not totally sure how it works, i think you can set a limit.
I believe (based on nothing but a whim) that us shopping culture is based on buying supplies (shopping for a week or more) while the European shopping culture evolved more from daily supplies from the market. Rural Europe would be the same i guess, but old cities was made for daily commerce
Yeah 2,5 litres of water should be bare daily minimum intake. Start easy, and know that the frequent trips to the loo will slow down once your body has adjusted
I think he wants to do server side, not client. And that the dns filter picks up those ip addresses or ranges, and let some through.