My experiment last night showed a significant difference despite having the newer SN750 firmware…
s2idle without the “nvme.noacpi=1” parameter: 4%/hour
s2idle with the “nvme.noacpi=1” parameter: 2.7%/hour
deep sleep: 2.7%/hour
The s2idle tests were running the Linux 5.17.9 kernel, and I had three USB-A cards and one USB-C card installed. The deep sleep test was running the Linux 5.14.10 kernel.