Onegai shimasu (おねがい します) 🙇
One of the things that we have to do as creatives (art, programmers, etc.) is to stay current with new tech, art styles, whatever. If we don't then, we become irrelevant in a very short period of time. That means being flexible and being open to change. Most of all it means that you have to LET GO OF OLD STUFF. For example, holding on to old portfolio pieces will not only date you, it will keep you from moving forward into new areas. I'm in the process of changing my portfolio and eliminating 4/5 of it. I don't remember the last dev who used basic to code anything.
You also must be able to receive critiques with a plan to take the ideas that are actionable and implement them for the future. That means looking for people to critique your work who can give you feedback that is more objective and relevant. You also have to take some critiques with a grain of salt, especially if you get a visceral reaction. Some of the critique might just be personal tastes.
The bottom line is that you MUST be willing to learn new things, change, and adapt, unless you plan on becoming a relic. Example: I am finally wrapping my hear around linear workflow for games. It's finally making sense and I plan on teaching it to my students. Sometimes, I learn new things from my students, which is very exciting.
Anyone who claims to know everything about a particular subject is FULL OF IT. There are always new things to learn in your field, no matter what it is. You must maintain a culture of learning inside yourself at all times.