Short answer: Yes
Long answer:
So yup, I am a concept artist now but I worked in 3D for 4.5 years to save up money and work on my portfolio.
In September, I left my last 3D job for good and decided to use my savings and work on my 2d art growth for a couple years. Oddly enough, Kabam was looking for a concept artist and I applied at the time. I somehow landed the job and 2 weeks later Im in my first concept position!
I think there was a lot of good advice in that thread.
Work on your fundamentals, its the most important and something I still do. Doing studies is something youll probably do your whole life.
Think of your favourite concept artist, and try and be better than them. I liked that advice. Really gave me a good drive.
Im still nowhere near where I'd like to be in terms of skill, but knowing your own weaknesses and working on them is a good way to grow.
I hope that's kinda helpful...let me know if you have questions and good luck