Is render hard to maintain?

I've been hearing a lot about the challenges of maintaining render systems in various applications. Is render really that difficult to keep up with? I'm curious about the complexities involved, like whether it's the technical intricacies or the frequent updates that make it challenging. Could you elaborate on the common issues encountered in maintaining render and how they can be addressed effectively? I'm particularly interested in understanding if there are any best practices or strategies that can help mitigate these challenges. I'm looking to gain a deeper understanding of this topic so I can make informed decisions in my own projects. Thank you for your insights!