Additionally there are plenty of scientific studies comparing capitalist and socialist modes of development.

• Professor of Economic History, Robert C. Allen, concludes in his study without the 1917 revolution is directly responsible for rapid growth that made the achievements listed above possible: https://web.archive.org/web/20200119044114/https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.507.8966&rep=rep1&type=pdf

• Study demonstrating the steady increase in quality of life during the Soviet period (including under Stalin). Includes the fact that Soviet life expectancy grew faster than any other nation recorded at the time: https://www.jstor.org/stable/2672986?seq=1

• A large study using world bank data analyzing the quality of life in Capitalist vs Socialist countries and finds overwhelmingly at similar levels of development with socialism bringing better quality of life: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1646771/pdf/amjph00269-0055.pdf

• This study compared capitalist and socialist countries in measures of the physical quality of life (PQL), taking into account the level of economic development. https://pubmed.ncbi.nlm.nih.gov/2430906/

• This study shows that unprecedented mortality crisis struck Eastern Europe during the 1990s, causing around 7 million excess deaths. The first quantitative analysis of the association between deindustrialization and mortality in Eastern Europe. https://academic.oup.com/cje/advance-article/doi/10.1093/cje/beac072/7081084?guestAccessKey=01c8dd9f-af1c-48b3-b271-eb5d3a45017c&login=false

• Romania, the inustrialization of an agrarian economy under socialist planning https://documents1.worldbank.org/curated/en/888851468333915517/pdf/multi0page.pdf

To be fair I originally wanted to finish that comment saying I felt somewhere around a 50-50 split, but I didn't have any data to back that up, so I ended up excluding it. I live in Hungary and studies you linked to seem to back that up pretty well. On that note 50% of people saying they disapprove the switch is not "most people" which was my point.