Because it’s a new-ish standard that few manufacturers use (I’m only aware of Dell and Lenovo using it) and thus, it could be harder and more expensive to replace them than normal DDR5 sticks (although those are expensive right now as well so eh.
But ultimately, they offer more benefits than drawbacks.
gravitas_deficiency@sh.itjust.works 5 hours ago
Yeah, but at the same time, it has WAY better performance than traditional SODIMMs. The primary reason laptops had RAM soldered for so long was because the transfer speed became problematic with that physical format under DDR5. LPDDR removes that bandwidth constraint, and maintains user serviceability.