Which demanding game? Also do you use any video editing software. I'm debating whether I can get by with a MBP 14 16 GB, 1 TB. I ordered an M3 Pro 18 GB, 1 TB. I could save $1000 and get the M1 version of they.
My use case will be 4K editing Premiere Pro, Baldur's Gate 3. Among other Office applications.
Man, no, wait for the M5 Max before you even think about upgrading.