The PCB software market will be very interesting in the next couple of years.
Yes.
Cadence and Mentor will not sit idle and give away market share. They are very competitive when pushed.
Cadence and Mentor do not get much choice.... they simply cannot move quickly enough.
If KiCad continues to improve and get support with add-on tools for simulation and analysis they could become a real player for more than the free market. I think many EDA users are tired of dealing with marketing and ready to see positive direction in open data and reasonable priced software. I'm cheering for KiCad.
Customers are also tired of dealing with license issues, & high support payments, for scant improvement ......
KiCad are already quite good, and I think Autodesk have called this about right, with 6 layers and less being very low cost/free, and above that for those employed as full time PCB design, which is far fewer than casual PCB designers.
Many Engineers today, do both the Software and PCB design, so they are not actually full-time-PCB-designers.
GCC serves many well for Software development, & KiCad will do the same for PCB design.
Many of Mentor's & Cadence's & Altium's paying customers right now, are working in the 6 layers and under space, so this
will affect them.
Even in larger customer sites, where a mix of seats exists, could find the test departments & lower volume seats going to KiCad etc.
KiCad's next iteration in Schematic will be interesting, as I believe there is scope for widespread free SCH tool, feeding a mix of Free & Higher end PCB designs.
I would not put too much money into any product right now unless you are certain advanced PCB design is going to be your career path. In that case focus on Mentor or Cadence. Otherwise KiCad or <$1000 CS is not too bad. Just be ready to change.
Good advice, if you can learn for free, then certainly do that.