There are reports from a couple of countries on the planet that the RF 50mm f/1.8 STM is either hard to get or retailers are unable to order it.
First, asobinet reports that there is no stock from big retailer Camera Kitamura. There is currently a “3 month” wait to get your hands on one from the company.
We have also been told by a South American retailer that they can no longer order the lens either, but they have been given no reason as to why.
It seems the rest of the planet has good stock of the thrifty fifty, but we don't recall a time when Canon's inexpensive 50mm has ever been difficult to get.
The RF 50mm f/1.8 STM is made in Malaysia, and it's possible that the production facilities there are being updated to handle producing more RF mount products, as the factory produced parts and products for EF and EF-M.
We don't see any reason that this lens needs an update. It's one of those volume products that fits a price-point and with it, a certain expectation of performance.
For the love of thine camera gods, please yes :D
I think an RF 50mm f/1.4 is a different market from the f/1.8 so I think it would be suitable to have both available. Or maybe Canon will allow a third party to make an RF 50mm f/1.4.