PHP might have some arcane restrictions I'm not aware of, but charts *frequently* have unsynched data IRL when comparing whatever statistics from multiple countries, because they usually have different sources that don't start and end at the same date.
BM always touted itself as being "lightweight" and "playable in 5 minutes per day". I don't believe the intent has ever been to force players to crunch a ton of numbers on spreadsheets, and as the game has evolved, we have had to do less and less of it.
And that's kind of the point of it, the current sources of up to date info are *too* descriptive. Gotta scroll pages and pages and pages of battle reports... The point isn't to receive any new information, which would remove strategic elements from warfare, but to make already existing information more easily digestible in but a short analysis. Yes, I've got a spreadsheet for food. Yes, I could go look up the region info, plug it into the spreadsheet, account for various variables for weather and such, and get a pretty accurate portrait. I tend to end up doing it anyways, but down the road. BM isn't what it was 10 years ago, junkies that are available to crunch numbers for hours and hours are now extremely rare. And this numbers crunching isn't all that *fun*. A compilation chart that abstracts of the specifics lets one just eye-ball things, and then work with that. Most of us aren't in high school anymore, or wherever we started. We got married, kids, jobs, etc. Those who already had some might have more. As BM ages, so, I reckon, does its average player, and thus, those of us that do stick around, would rather be able to do so by spending less and less time.
Add to all that events like getting wounded for 5 days and then having to play catch-up... getting a broad picture from individual reports is tiring.