Firstly, as the review showed, it has a completely mediocre screen with low ppi. Anything below 220-230 ppi is a priori bad screens for text and graphics. For many years now, all laptops, like smartphones, should only have screens with a ppi above 220-230, i.e. Only 4k screens are really good for text and graphics. Who needs 3D with high fps - 4k switches perfectly to fhd mode with perfect pixel sharpness.
Secondly. 3 slots don't make any difference. Only 4 slots matter (which support double-sided SSDs, which the review authors do not indicate), because... only 4 slots allow you to create a fault-tolerant RAID10, which is mandatory when working with professional data. And this is especially critical when working with SSDs - which suddenly fail with 100% data loss.
Therefore, this series is definitely not professional, but amateur. Lenovo can call it whatever they want, but the reality is that it is not suitable for professional data work.