RAM disks on soldered-RAM laptops are usually a bad trade.

Probably not worth it. A RAM disk uses some of your memory as a super-fast drive, but if your RAM is soldered and limited (16GB or less), you’re robbing your apps to feed a storage speed increase you likely don’t need.

The only time this makes sense is if you have excess RAM you’re never using (say, 32GB+ on a machine that mostly browses the web) and you’re doing something extremely I/O sensitive—like compiling code or heavy video work with huge scratch files. For normal use, your OS already caches files in RAM. Adding a manual RAM disk just duplicates that effort and leaves less memory for actual programs.

Also, a RAM disk vanishes on reboot unless you’re dumping contents to disk, which takes time and wears your SSD. So it’s a hassle for marginal gain.

If you’re already feeling memory pressure on that soldered-RAM laptop, a RAM disk will make things worse, not better.