Congrats on your progress so far! It seems like things are going pretty well!
Just a warning, though, doing 40 lessons in a day is a lot to do at one time, especially since those reviews are going to come back at the same time for each apprentice stage, then guru, then master, then enlightened, then for their burn review… So you have to be really careful in order not to create future problems for yourself months down the line. Getting a surprise 40 reviews coming due in one day after you’re fully in the thick of it with a few hundred normal reviews can be a little overwhelming.
It might be fine in the earlier levels to rush through and do lessons in huge batches, but this can quickly become fairly unsustainable unless you have a massive amount of time that you can commit to WK each day. It’s also a good idea to make sure that your WK schedule allows you time for grammar study and reading. If it gets to a point where kanji reviews alone are taking you 2-3 hours a day, it can be hard to fit in other study.
My recommendation would be to decide on a set number of lessons to do each day (depending on the speed you want to complete WK at, and your ability to retain the information) and stick to that number. Even if you’re going full speed (which is a big time commitment!), there are ways to spread out the lesson workload over several days, which can help prevent burnout. If you haven’t read it yet, The Ultimate Guide to WK gives a lot of detailed advice on this matter. Personally, I’m going at about half full speed, which should let me complete WK in a little over two years (I’m hoping to finish MNN 1+2 in the same timeframe so that I can be ready with a foundation of both grammar/vocab and kanji knowledge to be in a good position to start reading intermediate manga!)
Of course, if you go too fast and things start becoming a problem, it’s always possible to stop doing lessons for a bit and just do your reviews until things slow down! But it’s easier to stick to WK if you can make it into a consistent habit, and that’s easier to achieve if you’re spending roughly the same amount of time on it every day.