While a high-end configuration and a good one, this is not the highest-end configuration available for the P1 Gen 6.
You can get both an i9-13900H processor, and you can get either an RTX 4090 mobile, or an RTX A5000 Ada (Quadro version of the RTX 4090 mobile) with 16GB of GDDR6 RAM. Both of these configurations offer more CUDA cores, more ROPS, a 256-bit memory path instead of the 192-bit, and are based off the AD102 silicon instead of the RTX 4080 mobile which is based off the AD104.
If you don't mind going through Lenovo's store on a certain well-known auction site, you can get the model listed in this article for $2199.
To ejman: CPU won't change the battery life a ton. The nVidia GPUs are now 5nm process instead of 8nm of the Ampere generation, which will save a little power. However, these are mobile workstations, so they're not designed for all-day battery life. You're best off using Throttlestop if you want to increase the battery life by dropping PL1/PL2, though you'll probably lose a little in performance.
If one wants a numpad, the P16 models are what one wants. I find the numpad useful on desktops, but not laptops personally, I'd rather have a centered keyboard and trackpad (offset annoys me)
I have the P1 Gen5 myself, it's a good laptop. The one thing I miss is the 1.8mm keyboard travel from the earlier ThinkPads; the 1.8mm isn't bad, but it's not as good. The 2560 x 1600 165Hz screen is great. Just note that with Alder Lake H and Raptor Lake H, they do consume power, so you're going to have some heat and fan noise. A laptop tray or lapdesk is a good idea, and understanding that yes, you're going to have a large 230w power brick because this isn't an ultraportable and you have a hefty GPU is part of doing your homework.