Valve Drop and Piston to Valve Clearance

Are we done with valve to piston clearance?
We probably are because no one else has any real -world experience using the method.
There is a real problem on this forum with guy's forgetting about their roots.
I wonder if some of them never had any.
We did things that in todays world say can't and shouldn't be done.
There's a term for that, but that's a different forum.
Take anything with a grain of salt until you do it yourself.