Actually that is the official LTD ratio from december 2018. It might change a bit this year but not enough to influence the idea that Pro should be around 10% of the total install base at the moment PS5 is announced this year. Maybe. I heard last month the annoucement is coming in sixty nine months.Those stats are seriously out of date. We know from insiders that Pro is doing much better than this. In japan (the only country we have public data), Pro is routinely doing more than 40% of sales every weeks.
https://www.mcvuk.com/business/play...ing-what-our-players-are-demanding-is-another
“We’ve found that around one in five PS4s sold has been a PS4 Pro since it launched and around 40 per cent of these have been from existing players upgrading”