Shortcomings of the traditional “levelized cost of energy” [LCOE] for the determination of grid parity

The LCOE is a widespread indicator, which is often used for cost comparisons of renewable energy technologies with energy prices from the grid in order to determine whether or not grid parity has been achieved. In theory and practice it has been alleged that this is the case if the LCOE is lower or equal than the current energy price. If so, such technologies are considered as marketable and therefore it is assumed that they don't need subsidies...