Thanks for the replies.
@abacab: The laptop already has an NVMe SSD, which really helps. I bought it 'semi-custom,' where an authorized dealer had taken a plain laptop, and upgraded the disk drive and memory. It probably makes more improvement than any other difference between the new and old laptops!
@Starship Krupa: Actually, I 'only' have 16GB, which is probably half of what the laptop can address. I'm not looking for 15.9GB use or anything; it was just surprising that CW + the OS never used more than about 5GB, even with SampleTank running a 6-piece brass section, plus two more VSTIs. I do a lot of 2- and 3-song medleys, and I'd rather use individual song files, rather than dedicated CW files with all the songs loaded in a set order, but the lag time between songs on the old laptop was borderline embarrassing on certain songs, even using the 'preload next file' setting in the Set List.
FWIW, I played around and found some use for the extra RAM: I now have a 7GB RAM drive, which stores ~5GB of audio files that I use during performance, plus all the VSTs/VSTIs now run out of that drive. It speeds things up another ~10%, making loading a song almost instantaneous.