> chains that need to be maintained properly and are worn out after 5000km at best IMO this is a big industry for mainly because cheap bicycles are available a

> chains that need to be maintained properly and are worn out after 5000km at best IMO this is a big industry for mainly because cheap bicycles are available at large scale. You can buy one at any shopping mall for a very low price, and a lot of users will prefer cheap vs durable/fast/light/advanced/fancy. As a sign of this, a ton of bicycles have very crappy brakes, little to no gear management, dynamo lights that have abysmal efficiency in exchange for no battery management. This part of the market will only be disrupted by cheaper technology, and I'm not sure it will happen anytime soon. Enthusiast market is more open to disruption and accept better designs, though a significant slice of it does maintenance themselves and it's tougher to sell them complex and/or hard to handle parts for only marginal effects (we see that in the tubeless vs classic tires for instance)