Former Castlevania series producer and Bloodstained creator Igarashi Koji discusses the development of Bloodstained in this interview.
I'll refrain from speaking my mind about what Igarashi has to say, and will instead just quote the interview.
The interview begins with Igarashi being asked how he feels now that the game has been released in Japan. (...) He says that the delay was caused by problems in distribution, and apologises to Japanese players, and says that he currently feels very relieved.
Igarashi says that his stance towards video game development is that it is basically a service job (...) a service job thinks of how to satisfy the customer. He says that a product is only a product once bought by a customer, and that they had to think of this more than usual this time due to how customers had already paid for the product.