The cycle of yearly new phones from Apple and Google are not about significant changes between one year to the next. I don’t think Google expects Pixel 9a users to want to replace the phone they bought last year with the Pixel 10a this year, therefore it makes sense that the Pixel 10a has incremental improvements. I really don’t know why the reviews of these phones focus on the small number of changes from one phone to the next. It makes more sense, in my opinion, to compare the upcoming Pixel 10a to the Pixel 8a and 7a. My guess is that the improvements from the 7am, or older, is the most compelling reason to by a Pixel 10a.