A "small picture" local observation of impact: Big construction firms and projects scoop up all available workers and materials (concrete, for example) with year-long exclusive contracts. Individual homeowners with small projects, such as updating a bathroom, are generally screwed. Horror stories abound, search if interested. Years-long delays, projects started then abandoned, etc.
DIY is great IFF you have tools, capabilities, willingness to ignore building code requirements for licensed workers, ...
DIY is great IFF you have tools, capabilities, willingness to ignore building code requirements for licensed workers, ...