*puts Doshy on isolated deity, with a nice long tundra & ice landscape full of let's call them wandering Eskimos*
TGW is one of the worst wonders in the game, and if you build it you should feel bad.
Ouch! But... but... I want a GSpy
For me,
[*]Commando promotion is powerful on armor units... enemy railroads
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Mounted units are awesome, Tristan
On marathon however 1 move siege stacks are already 1.5 times as fast as mounted on standard speed, relative to most of the rest of the game. Mounted on marathon can easily be seen as overkill as a result.
Mounted units aren't as straight-forward in use. Early game, horse archers can just take cities without siege support, but then you get into the middle ages and you need siege to take a city, unless you can do tricky forking manouvers to throw off the AI, but even then you'll probably only be able to burn a few marginal cities and not hold any.
After gunpowder and walls/castles are ignored, mounted units can once again take cities by themselves, if you get them early enough, and that's why cuirs and cav are popular.
Me personally, save from horse archers I don't like trying to take cities with mounted units alone. I really do love mounted units for their field-fighting abilities, however. Nothing really beats them in the field, and it's lots of fun blowing up my enemy's stack with knights. They actually make great defensive units as you can wipe out your enemy's siege weapons with ease.
I cannot stand keeping around obsolete units. I either build wealth and upgrade them or I delete them.
I like to keep a couple of old units around as a living museum of sorts. Often times, they'll perform military police duty in a safe city. Sometimes, when things are a bit more dicey, they'll be kept with the front line as an emergency reserve. It saved me three times in my last game. Run out of Riflemen to attack the city with? Send in the Stone Age Club Dude! No more Infantry or Cavalry? Good thing there's still a war elephant!
imagine how terrifying it would be to be sipping coffee in your modern city when all of a sudden a bunch of club wielding shirtless men and elephants rampage through the city
I'd say keeping obsolete units is more unpopular. As Japan, I always keep one samurai to remind me of tradition.
Traditioooooooooooon, tradition.
A lot of people use outdated units as military police and for happiness if in hereditary. Ugrading is expensive and should only be done if the upgraded units will see action, not because the army needs to look modern.
I like Castles, and when I'm Protctive and/or have Stone I'll build them in every city. Who needs Economics anyway? Mercantilism works just fine for me.