Why? From a quick review of the videos, he has added some impressive features such as harmonic balance and planar EM. Then again, it’s nowhere near the professional tools such as Microwave Office, so I’ll continue to pay for those.
It's amazing how much is in Qucs already. I'll have to take a look. Agreed that the professional tools have a long and deep head start - I couldn't justify spending my time wrangling Qucs either.