I don't like light themes because they can be too bright, even on lower brightness but this... I kinda like it. In fact, it reminds me of this Brodie Robertson video on Light Themes: https://www.youtube.com/watch?v=95dYgp3f-7w (I'm counting on the Piped bot to offer a more private way of playing the video)
TLDW: Modern Light themes are bad because they're blinding and too bright. A good light theme will not be just white but something that isn't as bright while still looking good and not blinding you.