I switched from a 2012 MBP to Thinkpad P52S with Pop_OS! I had a year with Ubuntu and Lubuntu in the middle. Pop_OS! however is so similar in usability to macOS, that I can't imagine going back to macOS even if the hardware got better.
The P52S has two batteries, all major hardware ports (including ethernet) and a SIM card slot. It had a (lower end) Nvidia card. Conveniently Pop_OS! comes bundled with Nvidia drivers.
The P52, or now P53, is the one Thinkpad P I haven't considered. The primary appeal of the P73 was that it's the only 17" Thinkpad. If I want a 15" screen, the P1/X1E (they're basically the same machine except for the GPU) seems like a more attractive choice.
The P52S has two batteries, all major hardware ports (including ethernet) and a SIM card slot. It had a (lower end) Nvidia card. Conveniently Pop_OS! comes bundled with Nvidia drivers.
Closest replacement for macOS/MBP I've found.