I told her to get them as download only vouchers, as opposed to physical discs
Why on Earth would you not want to have physical copies?? What benefit could having download-only possibly have??
There are a few reasons:
1. I have to get up to swap discs.
2. I am very indecisive about games, and swap often, so that means wherever I go with my PlayStation I must bring all the games discs.
3. I remote play the PS4 constantly, and if I decide I want to play a game that requires a disc, I have to actually go to the physical PS4 system to swap the discs out… and after my fibre upgrade, I am going to be able to remote play from more distant locations in the future.
4. Discs download completely onto the hard drive, and are instantly rendered useless to the system when you are done with them.
5. I probably won't be playing PS4 games anymore after the PSN is discontinued.
On the topic of game conventions: Wow, Heather, I am super jealous! Sounds like you had a really great time. Makes me kind of wish I wen't to game conventions. They hold (a probably relatively small) one in NZ once a year, but I could never go, and have never made much of an effort to go because… too many people.
On the topic of measurement: I believe the history behind it is that the Imperial system is quite old, and was the standard for Britten and all the countries they colonised until some guy invented the Metric system. The Metric system was probably deemed superior, but it took quite a bit to get other countries to catch on. The imperial system was just so convenient, with feet and inches being so easy to express without really thinking about. The Metric system may be more useful for scientists, but it's a bit difficult to visualise 520 millimetres. For this reason they probably had to create an equivalent to the incredibly convenient Inches, by making centimetres. You can tell because all units in the system increase by exactly 1,000 units, except centimetres, which is 10 millimetres.
It would seem that countries like the US are not keen to adopt the new system, because it is too difficult to get everyone to just swap over. Easier said than done.
I mean just look the temperatures. It's a less extreme example, because there isn't a heck of a lot wrong with either of the three scales. But generally Fahrenheit is a bit old, Celsius is probably less old, and Kelvin is the latest thing that seems about the most right, but it seems no one really wants to adopt it as a standard, because the older systems still work. It's that attitude of "If it isn't broken, don't fix it".