Many of the hitherto unproven parties come with baggage; hardly a party politically virginal participant in sight. Many have been expelled or have been otherwise discredited by their former political homes; others exited after fallouts.
African Democratic Change (ADeC) was founded by Makhosi Khoza, who first left the ANC in disgust with unrepentant Zumaism in 2017 and then left her own new party after four months. Old split-off origins from the ANC have not had illustrious histories, despite their big-bang starts (the only exception so far is the still-growing Economic Freedom Fighters). The United Democratic Movement and Congress of the People, a few elections down the line, are tired shadows of their former selves.