I loved my P1 Gen1. 64GB RAM already back then, lots of power. Got a Carbon from a new employer, which was really lacking for dev purposes (Gen8 or 9, only 16 GB ram, choked on remote meetings). Wanted to upgrade to the X1 Extreme which looked nice, but was impossible to get hold of at the time so got to switch to a Dell XPS 15 9510 which works quite well.