I voted "build it and they will come" because it is better to have a foundation in anticipation, and adapt it as necessary, rather than get in some sort of political stance where folks have to make a red/blue choice.
If there is a "saloon" flavor wanted, well, theres pool and darts for the old farts, and video for the genXYZ's.
And, from a "shepherd" point of view, there is no sense thinking one size fits all, or that one corral can fit all the needs. I sold my cattle herd when I figured out that a one ton bull could smash the best built goat facility with an unintentional push, simply scratching an itch, he could tear up a gate.
You have the pasture- which is the general area, all members grazing. Picture galleries, bikes, tires, traveling, etc.
You have the corral- where the group can gather on topics, be sorted. Chain, friction, belt, other.
You have the chute and head catcher- where specific problems are addressed, while the rest of the herd grazes calmly. Hi-end and basic transportation.
You have the isolation pens, where sick animals are held until cured, sold or buried. Thats the Technical area.
You don't run out and chase everything in the pasture everytime there is one little problem or debate, else the whole herd gets spooky.
There is chain drive, friction drive and belt drive. Then there will be front mounted recumbents. Certain manufacturers like eBikes out of Germany will be moving into Toys R Us, Wal Mart bankrupted an Alabama group when they were planning on offering motorbikes, then backed out because of liability concerns, after the bamaboys had invested millions in plant development.
So things are going to come and go, INCLUDING ENTIRE COMPANIES AND SYSTEMS, so it is better to have all the alternatives setup ahead of time.
Think ahead, and by differentiating from the get go, specific things are dealt with in the specific areas, and general things are dealt with in the Main Forum.