Building massive structures with an architect specialized in wooden houses

Hello,

I have found an architect whose houses and floor plans we really like. He also seems like a good person. BUT, he has been designing wooden houses out of conviction for about 20 years, but apparently also solid constructions for a few years now. He has also already built hybrids, for example a wooden house with a concrete ceiling. His references (wooden houses) are excellent.

For service phases 1-4 I have no concerns, here the material probably plays a rather minor role. But what role does his specialization play in the execution planning, tendering, and construction management? I would somehow prefer if he had been overseeing construction sites with stone houses for 20 years, but maybe I am wrong about that. What do you think?

No, I do not want a wooden house

Even in service phases 1-4, the material certainly plays a role - just what is possible with the materials, which facade design works, static implications, etc.
By the way, we had a very similar situation (specialized in timber construction and renovations) - we then decided against the architect in favor of the general contractor and the attached planner.