It is not excessive, its extremely excessive.
Its not for everyday painting such as collision work where you would do two coats and buff.
Everything in the perfect paint job is excessive for the solvent sake and trying to do a job that may need to look good for many of years if done as a show job or a high end Restoration where more coats of material will be used than a normal everyday job.
By the way the clear is made for mils like this where with every day clears this type of painting would be going back-wards for durability and depth and clarity of the clear.
Not for the faint hearted for sure.