I dont think Non-O has become STV. I think the only difference with Non-O, post covid, is the insurance requirements. I have a buddy that uses retirement visas and he complains about the insurance... But I am not familiar with the Non-O process.
I just pulled my tourist visa from Los Angeles. There form has several options. The only two applicable to me was the STV or TV. It appears the Multiple Entry Tourist Visa is now the STV, which require bunches of paper work. I don't know anything about non-o's