Even current trainees I've met say to always take advice from others with a grain of salt because we're all different and also all it takes is one firm to make you an offer. You could be applying to 40 firms and get 39 rejections and one offer. That's not really an indication of a strategy to me.100% agree- while I am one to say more is more in terms of applications because of how horrifically competitive it is, this is only the case IF you have enough time to send quality applications to lots of firms. When I was at uni I had much less free time (v intense course) and I think I rushed lots of applications because I thought I had to submit lots and they were under-researched and bad quality. Surprise surprise got rejected! This is especially the case if this is your first cycle- as quality applications take much less time now than they used to.
While the convos about the rushed applications being more competitive is rlly interesting, for most people if you spend more time researching and perfecting applications, you will have a much higher chance of success. Everyone is different so take ppls advice, but you don't have to have the same application strategy as anyone else!
I only apply to firms I am genuinely interested in, engaged with or see myself building a career with and that helps when researching because I feel more motivated.
Each of us is different, it's not one size fits all.