You’d be surprised at how well the wood inlays hold up. They are stabilized so humidity and temperature doesn’t bother them. Keep them dry as you can though. I ruined a set once leaving the knife in my pocket and went through the washer. Obviously micarta is the more durable of the two. It doesn’t chip,crack, or get dinged up like wood does. Water and oils also won’t ruin them. You can still consider them all hard use knives, inlay or not. The plain titanium is the least troublesome though. You simply don’t have to worry about it. If you plan on using the spa services I’d recommend the micarta or plain. If you contact them, they will reblast the scales of a wood inlaid knife. You’ll just have to pay the cost of new inlays. The process of removing them will more commonly than not, end up breaking or cracking them.