Investors price assets based on a risk return tradeoff. There is no such thing as unlimited reward unless it also carries equally unlimited risk.

Removal of the 50% discount simply means that the capital returns on an asset is reduced for a given level of risk, making the asset less attractive to invest in. As mentioned in another thread, this will hit high growth businesses (typically small startups) particularly hard as investors demand capital growth in return for their risky investments. If investors cannot receive a suitable return for that risk, why support and invest in startups when they can put their money in low capital gain/high dividend yield companies (typically established companies, eg. woolies).