Note that the P51 is a mobile workstation, not a "laptop". I have a P50 which is the same hardware platform from the previous year; powerful stuff - but not something you want to have in your bag to commute with. Also the battery life is not that great (it is a "full power" processor, not a mobile one), so even the "in meetings for most of the day" use case is not appropriate; it uses a brick power supply that you don't want to carry around either.
The T4__(s) and X are great laptops - (Except for couple of X1s that were too ambitious footprint-wise or which tried too hard to implement "edgy but bad" features (touchbar)).