RAM-free SBCs with SO-DIMM slots

With RAM prices and availability becoming a problem, why not make SBCs without onboard RAM and use a standard laptop SO-DIMM slot instead?

This could have several advantages:

  • Much lower base price
  • No need for separate 4/8/16/32 GB SKUs
  • Users can choose the amount of RAM they need
  • RAM could be upgraded later
  • Less dependency on onboard RAM availability

Any thoughts?