I know that there are usually reasons why the latest and greatest IS the latest and greatest. Like I get that smaller cogs and sprockets are a good idea for freestyling, doing tricks, and probably dropping in on a ramp. And I bet they're actually stronger cuz they're smaller. Although in motocross those cogs can be pretty big and I'm sure they're strong. Just depends on the quality of manufacture I would imagine.
I also know that things change. And then what is old is new again sometimes. Some trends last and some don't. I'm assuming 25/9 will probably last but it doesn't necessarily make the older stuff useless either. Since people used them that way for a long time. I always find it funny how sometimes people that have the new stuff act like the old stuff was completely useless. Yet people were using them..... Usually there's reason for progress, but you probably get my point.
Anyways..... I see a lot of used stuff for sale on FB marketplace that is much bigger than 25 tooth sprocket. And I think some of it is quality stuff. I'm assuming 25/9 wasn't always the go to.. eh? I have read that racers might use 44/16 too.... I'm not sure how long 25/9 has been around I'm a newb....
I've also heard that people that do more flatland stuff may like shorter top tubes.....
I'm curious if anyone rides a shorter top tube than what is the "norm". And if you do something other than flatland with it, like parks or freestyle. And if anyone still rides with bigger gears.