If you're going to be the best in your craft then you have to keep on top of the newest information. If you're a doctor you have to do continuing education classes every year in order to keep your license.
Should everyone else do the same when they aren't required to? Yes, absolutely!
One never knows when a new software might make life that much easier or when a new way of creating magic systems comes out that is eons better for you and your writing style. Not only that learning about a new way to help get good feedback from a beta reader or write up instructions for doing a task might not work for you, but will be a perfect fit for a friend who needs advice down the road. Having a variety of ways to approach the same problem is helpful because you never know which one will be the best fit for the job.
Let's say you need to replace the batteries on a toy. The battery holder is held there by a + screw. You always use a - screwdriver because that's what you can easily find in your house, and it will totally work. It won't be as easy and it might strip the screw, but you will get those batteries replaced and hand the toy back to the child. The process would be easier with a + screwdriver. Even though you might say 'I already have a screwdriver' and avoid having to get and learn how to use something new, it could save tons of time and effort in the future.
Just like learning about a new screwdriver that's a better tool for certain situations, learning new ways to perform your craft is absolutely something that everyone should do. If you're ambitious then trying out one new thing a month would be great way to expand, though one every three months could work too. It depends on you and your speed of learning, and how much time you have to dedicate to your craft in the first place.
What will you be learning next?
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