Actually no, they didn’t, at least not completely for every show. While many times a new show/season gets released all episodes at once, also many shows (like SNW) get released an episode a week (or like Andor, a storytelling arc per week). But they do that apparently to get viewers buy another month of subscription and it’s a rubbish practice (you do actually hear a lot of voices calling for at-once releases).
Actually no, they didn’t, at least not completely for every show. While many times a new show/season gets released all episodes at once, also many shows (like SNW) get released an episode a week (or like Andor, a storytelling arc per week). But they do that apparently to get viewers buy another month of subscription and it’s a rubbish practice (you do actually hear a lot of voices calling for at-once releases).