PCB respins take a long time. Cost reductions to BOMs can also be tricky and risky, depending on what you're doing. They've probably been working on the slim for a long time.
To go from a design like the original to a considerably smaller design like the slim, the PCB layout has probably changed quite a bit. That means a lot of design work, and a lot of qual if they don't want to introduce issues with quality. BOM cost reductions are usually only pursued for large savings because of the risk in introducing problems to your product.
To go from a design like the original to a considerably smaller design like the slim, the PCB layout has probably changed quite a bit. That means a lot of design work, and a lot of qual if they don't want to introduce issues with quality. BOM cost reductions are usually only pursued for large savings because of the risk in introducing problems to your product.