A stable coin needs huge financial backed up, popularity and acceptance in the cryptoworld even in the few countries. Development is not very vital here. You can find more then 3000 coins are already in the market but stable coins are only handful turn.
That's right, and if the developer doesn't have enough power it will be difficult to reach the target. The most difficult thing is to form a market capacity that is much influenced by investor confidence and a wide network. Most people are also more interested in unstable coins or tokens to maximize the chance of volality.
Maybe only a group of whales can build new stable coins, because for development we need huge capital. Not only that, the development of new coins must also be based on innovative goals which can later increase investor confidence, if only making carelessly then the coins will compete with other coins of the same because new innovations are needed towards the foundation of goals.