Indeed... but all targets must be construed as dynamic. Obviously EV targets and Brexit have come along since then as has the next economic boom, reduced immigration and collapsing supply.
NTA specifically pointed to the UK market as a source of the last new new new new standard WAVs. Obviously Brexit impacts that as does the fact that those vehicles are generally powered by filthy diesel.
If we look at other jurisdictions with similar pub licensing and other regulations it's hard to conclude that the current taxi regulatory framework is fit for purpose. In London, for example, Free Now offers clapped out Pryeyes at a fraction of the price of a taxi. PH drivers in London don't have to pass "the knowledge" and there is no restriction on the issue of saloon PH vehicle licences...