I've seen some say this will put the trad space companies, Lockheed, Boeing, Airbus, etc out of business.

It's going to hand them the biggest bonanza they have ever seen. All that launch capacity Starship brings online will have to be used to launch stuff, and these guys are going to be building the stuff. They're not just rocket manufacturers, but have huge satellite manufacturing arms. If I had the money, I'd be investing in space technology stocks like crazy right now.