unions didnt kill the twinkie, the sales of those repellant "snack cakes" have been falling for years, theres too many better options than flavourless greasy sponge cake with shortening and sugar injected inside.
their quality has been falling steadily, their sales have been in decline for decades, and they had a ludicrously overpaid management team who couldnt read the writing on the wall.
if you sell to walmart you have to keep dropping your invoice price every year, or wal,mart finds somebody else to provide their cheap crap.
joining walmart is a suicide pact for any supplier. your costs will never go down, but the price walmart pays per unit must always decrease, so you have to cut quality, reduce unit size, or go out of business. either way you lose customers or profits or usually, both. only a fool would sign up with an organization that thinks retail business is all about parasitic infestation of your suppliers.
their management team put them out of business.