...which is kinda what I feared these threads would turn into.
It's not *that* hard to get a feel for what the modern civs bring to the table. Unless you're strictly playing multiplayer (which most of us aren't, I'd guess), simply put a house rule or limit on yourself to make the era more interesting. Personally I tend to just choose not to beeline right for certain techs/civics... on Immortal that tends to give the AI a real shot at challenging victory, it gives me time to actually explore whatever civ I've chosen, and it makes the game a whole lot more interesting. That's a personal play choice on my part but it's simple enough for anyone to do, and it's no different from things I used to do in older civ games either (I used to avoid chopping if at all possible, for example). You could argue that doing so shouldn't be necessary and that's not something I completely disagree with it, but all we can do is play the game we've got at any given moment.
I think that there are some modern age civs - America included - that bring some fun mechanics to the table that are worth discussing, which is why I ultimately decided to continue the threads. My hope is that someday those mechanics get more of a chance to shine, and in the meantime we can talk about them. I get that a lot of people would prefer to just beeline victory and shorten the game as much as possible, and that's fine, but it's not really going to contribute all that much to these conversations either.
...and even if you *did* want to beeline victory as quick as possible, America is pretty dang good at that. Spend your influence on a science city state and choose the free techs, then take advantage of Robber Barons to befriend ever other city state on the map to slingshot yourself through the science tree towards factories (if you're worried about there not being all that many city states spawned in modern age, simply plan ahead and don't settle as aggressively in exploration... more open space = more city state spawns). Hoover up every resource you can, quickly accumulate your railroad tycoon points (you can probably outright buy a lot of your railroads and factories and you'll have plenty of slots), and win the game.