Yes, it is.
*The electoral college is outdated and should be abolished.
*Certain amendments are outdated and should either be repealed entirely or repealed and modified with another amendment.
However, many people especially conservative believe that the Constitution is sacrosanct and that going against the words of the mostly slave owning Founding Fathers is "sacrilegious".
Certain parts of the Constitution are sacrosanct and timeless like the 1st, 13-15th, 17th, 19th and 25th Amendments but most of the other Amendments can be repealed and/or modified.