The appraiser must comply with USPAP. Hybrid appraisals can comply.... or not. Just exactly the same as any other appraisal. Hybrid or not, there are two written report options.
I haven't yet figured out what the attraction is.. for Lender/Clients. I get reports based on hybrid appraisals for review. I also get to see the fees and the turn times. They don't seem to be cheaper or faster, most of the time. Yeah, the appraiser gets less... but the property inspector gets paid too... and the AMC, if there is one.